Subaru Impreza WRX
The Subaru Impreza WRX is a turbocharged version of the Subaru Impreza, an all-wheel drive, four-door passenger vehicle. It is available as a sedan or wagon.
Originally introduced in 1992 in Japan, then shortly afterward in New Zealand, Australia and Europe, the WRX had a turbocharged flat-4 2.0L (then later a 2.5L), Subaru Boxer engine. Compared to the base Impreza, the WRX has a turbo-charged drivetrain, wider low-profile tires, larger brakes, and firmer, higher-quality suspension components.
The Impreza WRX was first sold in North America in 2001 as a 2002 model year.
GC chassis (1992-2000)
There have been seven noted versions of the WRX. The STI versions were marketed with consecutive numbers. Another way to determine the version of a WRX was to look at the chassis code. All WRX sold between 1992 and 2000 have the beginning chassis code of GC8 sedan or GF8 wagon; this is followed by a letter from A to G.
Japan-spec
GC8A (11/1992-9/1993)
The WRX debuted in November 1992 with 240 PS (176.5 kW; 236.7 hp) at 6000 rpm with 31 kg·m (300 N·m; 220 lb·ft) at 5000 rpm. Both front and rear brake rotors were ventilated disks. The vehicle had a curb weight of 1,220 kg (2,690 lb). The center differential was a viscous coupling type. The rear LSD was a viscous type. The WRX Type RA (marketing has made usage of the RA acronym in various ways; Record Attempt is the current usage. "R = Racing, A = Group A, the FIA racing class the WRC Impreza competes in" has also been confirmed by Subaru of Japan; the correspondence can be seen on the discussion board for this article) is a stripped down version of the WRX for people to purchase for motorsports. It does not have many "creature comforts" such as air-conditioning or a radio. The car also lacks anti-lock brakes. The WRX Type RA has had a weight reduction to 1,170 kg (2,579 lb), and uses a closer ratio gearbox. The WRX Type RA steering wheel is a 3 spoke leather-wrapped wheel from Nardi.
GC8B (10/1993-8/1994)
In October, 1993, Subaru introduced the 1994MY WRX which produced 240 PS (176.5 kW; 236.7 hp) at 6500 rpm with 28.5 kg·m (279 N·m; 206 lb·ft) at 5000 rpm. The wheels remained the same size. The rear rotors were substituted from drum brakes to solid disk. The vehicle gained 30 kg (66 lb) to a total curb weight of 1,250 kg (2,756 lb). October 1993 was also the start of production of the wagon version, with 220 PS (162 kW; 217 hp).
It is also debated whether or not it was just the GF8 Wagon received the 220 PS (161.8 kW; 217.0 hp) engine or if the 1994 WRX received it as well. Previously this entry stated the WRX engine was downgraded to 220 PS (161.8 kW; 217.0 bhp).
WRX SA Model (which had the totally different chassis which was designed by Aiden Humphries)
built May 1993 until Sep 1994 (GF8-B only) came as auto and manual. with or without aircon on both models. the engine and ecu was the same as the normal wrx wagon (manual or auto models) had colour coded mirrors but black door handles came in colours deep blue (331), deep green (307), flamy red (936), light silver (406), black mica (47a), feather white (230)
GC8C (9/1994-9/1996)
In November 1994, the WRX had a power increase to 260 PS (191.2 kW; 256.4 hp) at 6500 rpm with 31.5 kg·m (309 N·m; 228 lb·ft) at 5000 rpm. The wheel diameters were increased to 16 inches (410 mm) and brake rotors were both changed to ventilated disks. With these modifications, the curb weight decreased to 1,230 kg (2,712 lb). In Japan, the WRX was also offered in the Sport Wagon and was called the Impreza Gravel Express but was discontinued due to very limited sales, and replaced by the Subaru Forester.
The 1996 WRX debuted on January 1996. The WRX design received minimal mechanical changes, but a WRX V-Limited Edition was introduced to celebrate the success of the Impreza WRC car in the FIA WRC. It was mechanically the same to the WRX but had a curb weight nudge to 1,240 kg (2,734 lb). The V-limited cars are painted in World Rally Blue.
GC8D (9/1996-9/1997)
In September 1996, the WRX was updated with new styling. The 1997 WRX now has a power rating of 280 PS (205.9 kW; 276.2 hp) at 6500 rpm with 33.5 kg·m (329 N·m; 242 lb·ft) at 4000 rpm (280 PS (205.9 kW; 276.2 hp) at 6500 rpm with 35.9 kg·m (352 N·m; 260 lb·ft) 4000 rpm for the wagon version). The car now weighs 1,250 kg (2,756 lb).
GC8F (9/1998-9/1999)
Produced from 9/1998 through 9/1999. Mechanically this was virtually the same as its predecessor. The torque was increase a little from 242 lb ft to 250 lb ft at 4000 rpm. The weight also continues to increase and is set at 2800 lb.
GC8G (9/1999-9/2000)
The last version of the WRX is introduced on September 1999. There is no change in the mechanical specifications. Added features are newly-designed alloy wheels, color-coded mirrors and door handles, remote central locking, intermittent wipers with a timer and map lights. Red Mica had replaced Bright Red..
UK-spec
GC8A (1992)
The WRX was introduced as the Impreza GT (Europe), Turbo 2000(UK). It came with 208 hp (155 kW; 211 PS).
GC8E (1997)
The Subaru Impreza WRX GT's(Turbo 2000) interior and face have been updated to leather.
UK-spec Special Variants
"1.8GL" (1993)
Subaru imported six Type RS's, the development car that led to the stripped-out Type RA. For UK car certification reasons they were registered as 1.8GL's despite having big turbos attached to 2 litre engines. Three cars went to Prodrive; three were retained by Subaru UK and were subsequently sold.
Series McRae UK Version (June 1995)
To commemorate Colin McRae's success in the international rally scene and his 1994 RAC win in particular, Subaru released 200 limited edition 'Series M cRae' cars, prepared by Prodrive. These vehicles were finished in a very limited 'Rally Blue' mica colour scheme, sported gold 6.5"x16" Speedline 'Safari' alloy wheels, McRae decals, individual numbered badging from 1-201 (car no. 13 was never built since the number 13 is considered unlucky), and a factory-fitted electric tilt/slide sunroof. Recaro seats were fitted in the front, and the rear seats and side panels were retrimmed in the same Le Mans/Avus material.
On the road price was £22,999.
Catalunya (March 1997)
200 cars (again excluding car number 13) in Black Mica with red flecks riding on gold alloy wheels were made to celebrate winning Subaru's second WRC manufacturer's title at the Rally of Spain (Catalunya). The car was sold for £21,610. A similar car in Blue Mica was sold in Italy.
Turbo Terzo (April 1998)
333 Cars In Blue Mica And Gold Alloys, to celebrate their manufacturer's WRC title. It cost £22,995.
Subaru won a hat-trick of manufacturer championships and celebrated once again by releasing a new special edition Impreza. The Subaru Impreza Terzo (Italian for 3rd). Only 333 Subaru Impreza Terzos were made, as a mark of the three championships won with the Subaru Impreza.
RB5 (1999)
To celebrate the return of British driver Richard Burns to the rally team in car number 5, a limited edition of 444 cars in "Steel Blue" (aka Cool Grey) was created. The basic £24,995 model had little more than cosmetic differences, but most had the WR Sport Performance Pack, an option consisting of a new ECU and exhaust for 240 PS (177 kW; 237 hp) and 350 N·m (258 lb·ft) torque. The price for the higher spec car was £27,495. There was also an optional Prodrive suspension pack that cost extra again. Standard Impreza Turbos could be fitted with the suspension pack and cosmetics to create a 'Prodrive WR Sport'.
Prodrive WR Sport (1999)
The standard Impreza Turbo 2000 was tuned and partly restyled by Prodrive. It featured a Prodrive - exclusive interior, a Prodrive suspension upgrade, Prodrive bodykit and wheels, WR Sport decals and an optional ECU upgrade for increased performance. It sold for £30000.00
P1 (March 2000)
Prodrive upgraded 1000 Imprezas for a price of £31500.00
GD chassis (2001-2007)
In 2001, the Impreza line received a complete update. The chassis received a 120% increase in torsional stiffness. The version nomenclature was dropped from the name, though Japan, New Zealand and Australia still refer to them as versions 7, 8, 9 and 10. To distinguish between the years, Japanese and other auto-enthusiasts often refer to the chassis as GDA (the WRX had an 'A' where as the STi had a 'B') revision A to G where G is the current (2007) version. The wagon chassis is given a GGA code.
The WRX has received two styling updates. The exterior "bug eyed" styling was widely regarded as attractive, so Subaru introduced a mild facelift (called 'crocodile eyes'; although 'blob eyes' is used with a small negative connotation) of the front end in the 2002 Paris Auto Show. A third update was introduced in mid-2005, including the performance models, with the controversial "jet intake and wings" grille first debuted on the Subaru R1 kei car, along with new headlights (referred to as 'hawk eyes'; or 'pig nose' due to the shape and orientation of the grille), taillights, and bumpers. Subaru states that they chose this style to go back to their heritage, paying homage to their grandfathered company, the Nakajima Aircraft Company
Japan-Spec
Rev. A (2000)
August 2000 brings the 2001MY WRX NB sedan. It has an EJ205 with AVCS coupled with an MHI TD04L turbocharger. The engine produces 250 PS (184 kW) at 6000 rpm with 34 kg·m (333 N·m) at 3600 rpm. The wheels are 16-inch (410 mm) in diameter. The car uses 2 pot/1 pot front and rear brakes. The front brake rotors are ventilated while the rear are solid disks. It has a torsen rear LSD and a 4.44 final drive ratio. The transmission has close-ratio gears unique to Subaru of Japan at that point in time. The car has a curb weight of 1,340 kg (2,954 lb).
Rev. B (2001)
The 2002MY WRX NB sedan debuts on September 2001. The mechanical specifications are similar to the previous year's model but the curb weight has been increased to 1,350 kg (2,976 lb).
Rev. C (2002)
The WRX NB-R sedan is released on November 2002. The power and torque ratings are the same as the previous year. The wheel diameters are increased to 17" in size. The rear brake rotor is changed to a ventilated disk, leaving the car to use only ventilated disks for braking. The car has 4 pot/2 pot front and rear brakes. The rear wing is on wing risers. The car now weighs 1,361 kg (3,000 lb).
Rev. D (2003)
The WRX line receives a body exterior update and an improved transmission
Rev. E (2004)
The WRX WR-limited is introduced. The car receives an STI spoiler and an STI front chin. There is a WR-stickered titanium shift knob. The wheels are changed for STI, gold-colored Rays-sourced wheels.v df df
Rev. F (2005)
The WRX has an option to receive the same spoiler as the WRX STI and receives gold 17" x 7" wheels. The WRX has a viscous rear LSD now.
Rev. G (2007)
The car is mechanically the same as the previous Japan-spec revision.
US-spec
Rev. A (2000)
WRX's initial release date 2000
Rev. B (2001)
North America receives its first Impreza WRX models. They are equipped with an EJ205 engine rated at 227 hp (169 kW) at 6000 rpm with 217 lb·ft (294 N·m) at 4000 rpm. Unlike the Japanese EJ205, the US-spec engine uses a Mitsubishi TD04-13T turbocharger unit. In stock form, it reaches a peak 14.7 psi (1.0 bar) of boost. The seats are the same as the basic J-spec Impreza. The wheels are cast 16” x 6.5” version of the J-spec WRX NB wheels while the brakes are 2-piston/1-piston front and rear with the front rotors being ventilated disks. 2002 WRXs came with brake duct plates that guided the air in the front bumper vent to the wheel well. The gear ratios are the standard export models, but the final drive is a 3.9:1 ratio. The rear LSD is a viscous coupling type. The steering rack has a ratio of 16.5:1. The 4 gear electronic automatic transmission (4EAT) WRXs have a Variable Torque Distribution AWD system instead of the conventional viscous coupling center differential. VTD employs an electronically controlled hydraulic transfer clutch and a planetary gear center differential to distribute power in a 45:55 split between the front and rear axles under normal circumstances. The VTD system uses multiple sensors to measure front and rear driveshaft speeds, throttle position and gear selection. Then it actively transfers power accordingly between the front and rear wheels for optimum traction and handling. The WRX weighs 3,085 lb (1,399 kg).
Rev. C (2002-2003)
There are few changes from Rev. B. The gears are changed to RA-width gears (1 mm increase in size) to increase durability of the transmission. There is also a valve that prevents “drop-clutch” starts in an effort to reduce the number of shattered gear boxes from abusive AWD launching. The ignition ring is now illuminated with green lighting. Early 2002 WRXs had brake duct plates. At the end of calendar year 2002, the brake duct plates were no longer equipped on the WRXs. A shorter metal fuel pipe and longer connector hose were implemented under the intake manifold to avoid fuel leaks at freezing temperatures. The 2003 WRX also came equipped with slightly larger front brake rotors than the 2002.
Rev. D (2004)
The WRX received the same Peter Stevens-designed face lift that rest of the Imprezas received. The WRX uses the same contoured seats as the 2004 US-spec WRX STI. The WRX is equipped with multi-phase valve struts to improve ride quality while retaining good handling. The tachometer was moved to center, and the speedometer was moved to the right.
Rev. E (2005)
The WRX received an updated interior, body color rocker panels, black painted headlamp bezels, and wheels that were previously seen on the base US-spec Legacy and a single-port exhaust. Some WRX models have an STI hood scoop that is much larger than other WRX scoops. The suspension has also received a few small updates to make handling more efficient compared to the 2004 model. Cassette players in the stereo system were no longer offered as well.
Note: Saab released its 9-2X Aero, from its 9-2X line, which is essentially a re-skinned Impreza WRX Wagon of the same model year. It is manufactured by Fuji Heavy Industries, Ltd.
Rev. F (2006)
For 2006 the Subaru Impreza WRX received a complete front-end re-design, boldly styled headlights with smoke-tinted lenses, a three-section mesh-type grill, and distinguished new tail lamp clusters. Three trims levels are available: WRX TR (Tuner Ready), WRX, and Limited. The car’s curb weight is 3,140 lb (1,424 kg) for the WRX TR, 3,192 lb (1,448 kg) for the WRX, an d 3240 for the WRX Limited.
The biggest change was the 2.5-liter turbocharged intercooled EJ255 engine, producing 230 hp (172 kW) at 5600 rpm. It replaced the 2.0-liter EJ205 engine used since the WRX model's introduction. The larger-displacement engine produced 235 lb·ft (319 N·m) of peak torque at 3,600 rpm, compared to 217 lb·ft (294 N·m) at 4,000 rpm for the previous WRX. Performance was improved in all speed ranges, with greater emphasis on low-end and mid-range torque. The 2.5-liter WRX engine shared architecture and technology with the WRX STI engine, including Subaru Active Valve Control System (AVCS) variable valve timing and an Electronic Throttle Control system. The turbocharger remained the same unit as on the 2002-2005MY US-spec WRXs, but peaked at 14.8 psi (1.0 bar) of boost. The first gear in the transmission received dual-ring synchros to improve downshifts from 2nd to 1st and reduce notchiness.
2006 Impreza WRX models gained some chassis and braking system enhancements. On sedan models, aluminum front suspension lower A-arms reduced unsprung weight. (The rear suspension gained forward aluminum lateral links in the 2005 model year.) The steering rack was updated for improved steering feel and the steering rack ratio was been changed to 15.0:1. On all WRX models, 7-spoke 17 x 7-inch (180 mm) aluminum-alloy wheels replaced the previous 5 spoke 16 x 6.5-inch (170 mm) wheels. Tires were 215/45ZR17 versus 205/55R16 before. The more powerful brake system employed 11.5 in (292 mm) vented front discs and four-piston calipers instead of the previous versions two-piston calipers. The rear brakes were 11.3 in (287 mm) ventilated discs replacing the previous 10.3 in (262 mm) solid discs, and two-piston calipers replacing single-piston calipers. The calipers are painted red with the SUBARU name in white overlain.
The horsepower and torque numbers are likely underrated, as shown by independent dynamometer tests. If the 2005MY US-spec WRX had 217 lb·ft (294 N·m) of torque, then the 2006MY US-spec WRX's 235 lb·ft (319 N·m) should show a minimal amount of increase on the dynamometer. However, tests have shown that a 2006MY US-spec WRX puts out a higher peak torque rating than a 2005MY US-spec WRX with Stage 2 Cobb Tuning (turboback exhaust and engine control unit reflash). Dynamometer tests by Cobb on a base 2006 WRX show202 hp (151 kW) at the wheels.
Rev. G (2007)
Ikuo Mori takes the place of Kyoji Takenaka as President and CEO of Fuji Heavy Industries.
As a cost-cutting effort, the WRX has its aluminum suspension reverted to steel-cast pieces. The WRX and Limited trim levels receive an auxiliary audio port next to the cigarette lighter and MP3 CD playback.
Asia-spec
Depending on the country, one may be able to buy either Oceania-spec, Europe-spec or US-spec WRXs. There are no models unique to the Asian market outside Japan.
UK-spec
WRX UK300 (2001)
Subaru produced 300 examples of the UK300 to celebrate the rallying success in the UK from the previous years. It featured 18-inch-Prodrive-OZ-wheels in gold, Pirelli Rosso P Zero Tyres, a blue Alcantara Interior, UK300 floor mats, UK300 headlights, UK300 exclusive front and rear spoilers and UK300 decals.
WRX 300 (2005)
300 vehicles limited to the UK market were sold with Blue Mica exterior paint, 17" gold alloy wheels with 215/45 tyres, Subaru World Rally Team branded front bucket seats, a 5-speed manual transmission and the Prodrive Performance Package (PPP) all as standard equipment. The Performance Package increased power to 265 PS (195 kW; 261 hp) and 348 N·m (257 lb·ft) torque and equipped the car with a 0-60 time of 4.8 seconds and a maximum speed of 151 mph (243 km/h). 12 months' free subscription to RAC Trackstar was included in the basic on the road price of £21495.00 (approx. $31800). Considering that the total on the road price of the standard non-limited edition Prodrive Performance Pack equipped Impreza WRX was £21900.00, the WRX 300 represented very good value for money. Optional extras included a 18" P-FF7 wheel and tyre package, a Prodrive brake upgrade (front brakes only), a sports suspension upgrade and a special edition rear spoiler.
RB320 (2006)
In 2006 Subaru UK release the limited edition Subaru Impreza RB320 in honor of the late Richard Burns, who died in 2005 from cancer. Richard won the 2001 WRC Championship for SWRT.
The RB320 was available only in Obsidian Black, also features bespoke 18 inch alloy wheels and specially developed Prodrive suspension comprising Bilstein dampers, a sports spring kit with revised rear anti-roll bar and a ride height lowered by 30 mm (1.2 in) at the front and 10 mm (0.4 in) at the rear.
Also standard was a chrome mesh front grille, front lip spoiler, quickshift gearchange, side sill plates and RB320-branded gear knob, carpet mats and exclusive exterior badging. Each owner will also receive an individually numbered black alloy tax disc holder.
The Prodrive Performance Pack (PPP) boosts power to 320 PS (235 kW; 316 hp) at 6,000 rpm with torque leaping to 332 lb·ft (450 N·m) at 3,700 rpm. This reduces the 0-60 mph time to 4.8 seconds with a 0-100 mph time of 12.2 seconds.
GB270 (2007)
Subaru produced only 400 cars; 300 4dr saloon versions and 100 5dr hatchback models. The GB270 was available in either WR Blue Mica (4dr) or Urban Grey Metallic (5dr). The name was derived from the 2.5 litre turbocharged engine which produced 270 PS (199 kW; 266 hp) and 420 N·m (310 lb·ft) of torque. These upgrades meant a 0 to 60 mph (97 km/h) in 4.9 seconds was possible and 146 mph (235 km/h) top speed could be achieved. The top speed of the GB270 was slightly lower than that of other Imprezas because it featured a Prodrive Quickshift 5-speed gearbox which offered faster gear shifts compared to the standard 6-speed gearbox.
Prodrive fitted their upgraded suspension system, lowering height of the car by 30 mm (1 in) at front and 10 mm (0 in) at rear.
A Prodrive anti-roll bar, Prodrive polished stainless-steel mesh front grille, a set of bespoke 18" Prodrive alloy wheels - Silver on 4dr, Black on 5dr were included in the £22,995.00 on the road price.
Oceania-spec
Rev. A (2001)
The WRX has an EJ205 rated at 218 PS (160 kW; 215 hp) @ 6000 rpms. It carries 17” x 7” wheels and has 4-piston/2-piston front and rear brakes with ventilated disk rotors all around.
Rev. B (2002)
Due to complaints of slower acceleration in comparison to the GC-chassis WRX, the gear ratios and diff ratio are changed to the same specifications as the Japanese domestic market WRX to improve overtaking and in gear acceleration. The result is near identical first and second gear ratios to the GC, but with a noticeably shorter third, fourth and fifth gear.
Also added was a Suretrac limited slip rear differential. Japanese engineers claimed that drive would still be directed to the gripping wheel even if the other wheel was off the ground.
Rev. D (2004)
The WRX received the same Peter Stevens-designed facelift that rest of the Imprezas received. During 2005 a limited edition Subaru Impreza WRX WRP10 was produced, but limited to 200 vehicles.
Oceania-spec Special Variants
Subaru Impreza WRX WRP10 (2005)
See: Subaru Impreza WRX WRP10
Europe-spec
The Prodrive Performance Pack (PPP) is an official accessory for UK GD-chassis WRX's. It evolved from the WR Sport pack fitted to some RB5s. The 2007 version costs £1700 including VAT and fitting, raising power output from 230 PS (169 kW; 227 hp) to 270 PS (199 kW; 266 hp) and torque to 420 N·m (310 lb·ft).
Rev. A (2001)
The WRX has an EJ205 rated at 218 PS (160 kW) @ 6000 rpms. It carries 17” x 7” wheels and has 4-piston/2-piston front and rear brakes.
Rev. B (2002)
Due to complaints of the slower acceleration of the GD-chassis WRX compared to the GC-chassis WRX, the gear ratios are changed to the same specifications as the Japanese-spec WRX to improve acceleration.
Rev. D (2004)
The WRX received the same Peter Stevens-designed facelift that rest of the Imprezas received. The engine powerplant was improved to 225 PS (165 kW). Some cost reductions were made, such as downgrading the stereo.
Rev. F (2006)
2006: Europe receives WRXs with the EJ25. The power output is 230 PS (169 kW) @ 5600 rpm with 32.6 kg*m (320N*m) @ 3600 rpm. The car weighs 1,405 kg (3,097 lb). The final drive ratio on this car is 4.111:1. The car also received the same facelift as the other markets.
GC chassis comparison with the GD chassis
Pros
Subaru claims that the GD chassis is 148 percent and 82 percent stiffer in torsional and beam rigidity, respectively, than the GC chassis. This stiffness is primarily due to the addition of a steel "ring" which encircles the cabin at the B-pillar. While the stiffness was increased for passenger safety, it has the added benefit of providing more stability for motorsports events.
In terms of safety, the GD chassis scored much higher than the GC chassis and earned a "Good" rating (highest mark) from the IIHS's offset crash test. 4 stars front driver, 5 star front passenger and 4 star side safety ratings from the NHTSA. In a magazine article from the Dec. 2005 Firehouse magazine (a periodical written and made for firefighters), Ron Moore writes how it is well-known that the Impreza chassis has great protection in its B-pillars. This side structure has 8 layers of high-strength, high-tension steel including a round steel bar running through the middle. The author notes how drivers simply walk away from horrific side-impact accidents.
Cons
The GD chassis gains nearly 200 kg (441 lb) in weight over the GC chassis. Most of this weight comes in the form of chassis stiffening as the car was made to meet every country's crash standards. The weight also hampers the cars maneuverability, transitions and turn-in capabilities. The GC Imprezas were notable for being very lightweight despite having AWD. The WRX Type R STI Version VI using the GC chassis, at 1,260 kg (2,778 lb), was lighter than the competing Mazda RX-7 type RZ (1,270 kg (2,800 lb)) and Honda NSX type S Zero (1270 kg). In this fashion, the GC chassis has a better advantage.
The author of the aforementioned article also notes that the Jaws of Life need to cut the Subaru's B-pillars at certain points in order to cut through the car frame. This information was not widespread before, so there have been many incidences where firefighters could not cut the B-pillars due to their structural integrity. This may become a concern if the driver or passengers need to be cut out of the vehicle quickly.
GE/GH chassis (2008-)
The Impreza WRX was redesigned for the 2008 model year and is now based on a shortened Subaru Legacy platform. The new chassis represents a departure from some Subaru traditions with full framed doors and a hatchback body style for the STI and WRX versions. Subaru made an effort to control the weight of the new chassis. Despite the increase in size, stiffness, and safety equipment, the car's weight is similar to the previous chassis at 3,142 lb (1,425 kg) for the 5 speed manual and 3,208 lb (1,455 kg) for the 4 speed automatic.
The engine used is still the EJ255. The front suspension uses a MacPherson strut setup with steering ratio of 15:1, while the rear is a new double wishbone suspension. The US-spec WRX reverts back to a 2-piston/1-piston sliding calipers (dropping the 4-piston/2-piston fixed caliper setup), but have grown to 11.6-inch (295 mm) in the front and 11.3-inch (287 mm) in the rear, the same as the BL5-chassis US-spec Legacy 2.5GT and Spec B.
2008 WRX Spec
2.5L 4-cylinder: 224 hp (167 kW; 227 PS) @5200 rpm (400 rpm lower than previously), 226 lb·ft (306 N·m) @2800 rpm (800 rpm lower), 6500 rpm redline
17" x 7" alloy wheels with 205/50 R17 all season tires
Vehicle Dynamics Control (VDC)
Anti-Lock Brakes (ABS) with Electronic Brake-force Distribution (EBD) and brake assist
Hill-Holder system on manual transmission models
Touch-screen GPS navigation system (optional) Not available on Canadian Impreza/WRX models
80 watt 6-speaker audio system with single-disc CD player (standard) or 100 watt 10-speaker w/in-dash 6-disc changer including satellite radio capability (with Premium package)
Auxiliary inputs for portable multimedia devices
Dual-stage heated front bucket-seats (with Premium package)
60/40-split flat-folding rear seats
2009 Subaru Impreza WRX
In response to criticism that the new 2008 WRX was too soft, some changes were made for the 2009 model year. The EJ25 received a boost of 41 horsepower (31 kW) and 18 lb·ft (24 N·m) of torque, bringing the total output to 265 bhp (198 kW; 269 PS) and 244 lb·ft (331 N·m) of torque by swapping the previous TD04 turbo to an IHI VF52. This WRX is capable of 0-60 mph in 4.7 seconds and a standing 1/4 mile in 13.5 seconds at 102 mph (164 km/h). In addition, the 2009 model received stiffer suspension parts from the STi model, an aerodynamic package and Dunlop SP Sport 01 summer performance tires as standard equipment. Cosmetic changes included an updated mesh grill with WRX badge and darker wheels. The WRX is also only available with 5-speed manual transmission. In the USA, the 4-speed automatic is only available on a new Impreza model called the 2.5 GT, which features the same 2.5L 4-cylinder 224 hp (167 kW; 227 PS) Subaru Boxer Turbo engine as in the 2008 WRX. While in Canada, the 265 hp (198 kW) engine was an option on WRX 265 models in 2009 and the 224 hp (167 kW) is discontinued in Canada for 2010.
2011 Subaru Impreza WRX
For year model 2011, the Impreza WRX will get the widebody look in both sedan and hatchback, similar to the STi and the addition of quad muffler tips with diffuser which changes the look of the rear end, while the STi model will have more aggressive, bulging fenders. The new model gains 33 pounds over the previous 2010 WRX models. The wider body gives the 2011 WRX wider track dimensions. The new exterior design is being marketed to attract younger buyers.
An approximately 1.5-inch (38 mm) increase in front and rear track, firmer rear sub-frame bushings and wider 17-inch wheels and tires deliver improved grip in the 2011 WRX. The standard wheels are now 17 x 8 in (203 mm). vs. 17 x 7 in (178 mm). in the 2010 model, and tire size is now 235/45R17 vs. 225/45R17. The 2011 WRX will arrive in dealerships in the summer of 2010.
Motorsports
Subaru Impreza 2007 WRC
Subaru Rally Team revealed the new 2007 Impreza WRC Car on Friday 2 March with just seven days before the Rally of Mexico. Petter Solberg and Chris Atkinson have big hopes for the new Impreza after their not-so-impressive 2006 season in which they could not even win a single rally. As the teams left their base in England heading towards what will hopefully be a competitive weekend for rally Mexico they released details of the 2007 Impreza that will be competing for the rest of the season.
From the outside the New Impreza doesn’t look that different. Most of the work has been carried out on improving the performance and creating a car with more balanced tire wear. The team has worked with engineers and designers in Japan focusing on weight distribution, suspension and differential set ups and new dampers have been used to improve road holding.
The work on the new engine has been aimed at weight reduction. The work has included producing a new intercooler design with a turbo air inlet now going through the bonnet scoop. The FIA’s rules about aerodynamics have led to the removal of several apertures on the front and side of the bodywork which have been partially blanked off. The airflow under the bonnet now emerges through air exit holes on the side rather than in the middle of the bonnet.
The Impreza’s hydraulic control of the centre differential has been redesigned to improve its effectiveness and the exhaust has been moved to exit out of the rear bumper. The Subaru team has already started to design the '08 car but no decisions of when it will make its debut have been decided.
FIA
Currently only the higher powered version of the WRX, the WRX STI is homologated for Group N rallying. However, the S9 and newer models of the Impreza WRC car have a GDA chassis code. This fact signifies that the Impreza WRC cars are built off the WRX chassis rather than the STi chassis.
References
http://en.wikipedia.org/wiki/Subaru_Impreza_WRX