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2008 Subaru Impreza WRX STI

 

 

SUBARU TECNICA INTERNATIONAL

 

Founded April 2, 1988, Subaru Tecnica International (STI) is the Subaru motorsports division. Among other functions, STI manages Subaru involvement in the FIA World Rally Championship; supports Subaru involvement in the Super GT Series, Super Endurance Race Series, and Production Car World Rally Championship; develops and tunes motorsport engines and chassis; and plans, develops, and manufactures Subaru STI versions as well as parts, accessories, and official STI merchandise. Find a complete list of the company’s functions and other information at www.subaru-sti.co.jp/e/index.html.

 

Founding STI president Ryuichiro Kuze was instrumental in making Subaru the rally force that it is today. An experienced competitor in the Japan National Rally Championship, Mr. Kuze formed SWRT and worked enthusiastically to make Subaru the best in the world. Without him and the other dedicated people at STI, we would not have a Subaru Impreza WRX STI.

 

 

SPECIFICATIONS AND DIMENSIONS

 

  2008 WRX 2008 WRX STI 2007 WRX STI
BODY STYLES 4-door, 5-passenger
5-door, 5-passenger
5-door, 5-passenger 4-door, 5-passenger
ENGINE 4-cylinder horizontally opposed (Boxer), double overhead-cam (DOHC), turbocharged/intercooled 4-cylinder horizontally opposed (Boxer), double overhead-cam (DOHC), turbocharged/intercooled 4-cylinder horizontally opposed (Boxer), double overhead-cam (DOHC), turbocharged/intercooled
Displacement 2.5-liter 2.5-liter 2.5-liter
Horsepower 224 @ 5,200 rpm 305 @ 6,000 rpm 293 @ 6,000 rpm
Torque (lb-ft) 226 @ 2,800 rpm 290 @ 4,000 rpm 290 @ 4,000 rpm
DRIVETRAIN Symmetrical All-Wheel Drive Symmetrical All-Wheel Drive Symmetrical All-Wheel Drive
Transmission types:
Standard 5-speed manual 6-speed manual 6-speed manual
Optional 4-speed electronic automatic with SPORTSHIFT® manual control NA NA
Gear ratios, manual (:1):
1st gear 3.166 3.636 3.636
2nd gear 1.882 2.235 2.235
3rd gear 1.296 1.521 1.521
4th gear 0.972 1.137 1.137
5th gear 0.738 0.971 0.971
6th gear 0.756 0.756
Reverse 3.333 3.545 3.545
Gear ratios, automatic (:1):
1st gear 2.785 NA NA
2nd gear 1.545 NA NA
3rd gear 1.000 NA NA
4th gear 0.694 NA NA
Reverse 2.727 NA NA
Final drive ratio (:1):
Manual 3.900 3.900 3.900
Automatic 3.900 NA NA
CHASSIS Unitized body construction with Ring-shaped Reinforcement Frame structure Unitized body construction with Ring-shaped Reinforcement Frame structure Unitized body construction with Ring-shaped Reinforcement Frame structure
Suspension: 4-wheel independent 4-wheel independent 4-wheel independent
Front Strut-type with lower L-arm Inverted strut with aluminum alloy lower L-arm Inverted strut with aluminum alloy lower L-arm
Rear Double wishbone with upper A-arm</td> Double wishbone with upper A-arm Inverted strut with aluminum parallel link
Brakes Power assisted 4-wheel disc with 4-channel, 4-sensor Anti-lock Braking System (ABS) and Electronic Brake-force Distribution (EBD) Super sport power assisted 4-channel, 4-sensor Anti-lock Braking System (ABS) and Electronic Brake-force Distribution (EBD) and Brake Assist and incline start assist Super sport power assisted 4-channel, 4-sensor Anti-lock Braking System (ABS) and Electronic Brake-force Distribution (EBD)
Steering</td> Rack-and-pinion with power assist Rack-and-pinion with power assist Rack-and-pinion with power assist
Wheels 17 x 7.0JJ aluminum alloy 18 x 8.5JJ aluminum alloy 17 x 8.0 aluminum-alloy
Tires 205/50 R17 all-season 245/40 R18 summer only 225/45 R17 ultra high-performance
EXTERIOR DIMENSIONS
Wheelbase (in) 103.1 103.3 99.4
Length (in) 4-door: 180.3
5-door: 173.8
173.8 175.8
Height (in) 58.1 58.1 56.3
Width (in) 68.5 70.7 68.5
Fuel capacity (gal) 16.9 16.9 15.9
Curb weight:
5-speed manual 3,142 lb 3,395 lb (3,373 with BBS wheels) 3,351 lb
4-speed automatic 3,208 lb NA NA
INTERIOR DIMENSIONS
Head room front/rear (in) 40.3/37.6 40.3/37.6 38.6/36.7
Leg room front/rear (in) 43.5/33.5 in 43.5/33.5 42.9/33.0
Shoulder room front/rear (in) 52.8/53.2 54.8/53.2 52.7/52.9
Hip room front/rear (in) 53.4/53.3 53.4/53.3 53.3/51.9
FUEL EFFICIENCY
  5-speed manual,
4-speed automatic
6-speed manual 6-speed manual
EPA city mpg TBD TBD 19
EPA highway mpg TBD TBD 25
All specifications are preliminary and subject to change.
NA = Not Available


 

Read Driving Impressions by Editor Ric Hawthorne in Version 4.3.

 

SI-DRIVE/DCCD/VDC APPLICATION CHART

 

CONDITION SI-DRIVE DCCD VDC
Normal Driving
All-Season S Auto Normal
Performance S# Auto - Traction
Snow/Dirt S or I Auto + Normal
Motorsports
Pavement S# Manual Off
Snow S# Manual Off
Dirt S# Manual Off

 

 

INTERVIEW WITH HIROSHI MORI, PROJECT GENERAL MANAGER WRX STI

– translation from the FHI/Subaru STI microsite

 

The third generation WRX STI, born of the WRC, makes its debut. The first generation Subaru Impreza WRC won the Manufacturers’ Championship in three consecutive years – 1995, 1996, and 1997 – and the Drivers’ Championship in 2001 and 2003. The Subaru Impreza WRC also achieved a time of less than eight minutes at Nürburgring in spite of being a 2.0-liter turbo. The new Subaru Impreza WRC is based on its predecessors in the family line and is now recognized all over the world as a super sports car of the highest level.

 

Expectations on the evolution of the third new WRX STI are growing worldwide. Hiroshi Mori takes responsibility for the thought that was put into the new generation WRX STI.

 

“Because Impreza WRX STI is the flagship model of Subaru, speed and comfort are its two most important factors. Therefore, when designing the new WRX STI, I reviewed a conventional concept from the beginning and decided to rebuild it in the form of the Subaru super sports car for the future. Previously, the performance of the vehicle was good, but the quality was not as good. I challenged the development staff to improve the feel and comfort of the vehicle. A way of thinking called ‘the pleasure to handle at a beck and call’ became the concept of the STI chassis, which symbolizes the Subaru of the future.”

 

All new Subaru vehicles will give the driver the pleasure of driving – as easy to drive as the driver wants.

 

“It is the packaging that is most important when producing a car. Seventy to 80 percent of whether the car can perform is the relationship between the chassis and the tires. The Subaru Symmetrical All-Wheel Drive system is a superior system, but the new double-wishbone suspension improves the drivability dramatically.” The double-wishbone suspension is more flexible and improves the performance of the tires.

 

Additionally, the wheelbase was extended and the front and rear overhangs were shortened to improve balance and stability, which is most suitable for a sports car.

 

Added to superior basics, the electronic Driver Controlled Center Differential (DCCD) and Vehicle Dynamics Control (VDC) provide good traction and more control.

 

“The DCCD + VDC provide a new multi-mode control, which can synchronize the intention of the driver and the movement of the car, making it feel comfortable without the driver feeling stress while driving. Furthermore, the SI-DRIVE system increases and balances riding taste and environmental performance with a sharp response.

 

“The new WRX STI does not compromise at all in faithful responsiveness, traction, and stability.

 

“I really think that the philosophy of the new Subaru suggests that the passengers and driver understand driving pleasure instantly once they get into the car. The birth of this car can be said to establish the form of the new Subaru AWD sports car.”

 

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