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News

2008 Subaru Impreza® WRX® STI® Specifications
15 November, 2007
 
Body
5-door, 5-passenger with wide-fender design

Engine
Horizontally opposed (boxer), turbocharged/intercooled

Block
Specially reinforced die-cast aluminum with integral cast iron cylinder liners, five main
bearings, semi-closed deck cylinder design
Cylinders 4
Displacement 2,457 cc (150 cu. in.)
Bore x Stroke 99.5 x 79 mm (3.92 x 3.11 in.)

Heads/Valvetrain
Aluminum alloy cylinder heads with double overhead belt-driven camshafts (DOHC),
four valves per cylinder, Subaru Dual Active Valve Control System (Dual AVCS)
variable valve timing (operates on intake and exhaust valves)

Compression ratio 8.2:1
Max. boost pressure 760 mmHg / 14.7 PSI
Horsepower 305 @ 6,000 rpm
Torque 290 lb.-ft. @ 4,000 rpm

Fuel/Induction
Aluminum alloy intake manifold, sequential multi-port fuel injection (MFI), electronic
throttle control (ETC) system, high-boost turbocharger, cross-flow intercooler

Ignition
Direct with iridium-tipped spark plugs

Emission control
Bin 5 Tier 2 (EPA) / LEV2-California
Fuel requirement 93 octane required

Drivetrain
Symmetrical All-Wheel Drive with Driver Control Centre Differential (DCCD)
featuring three performance modes and six driver-selectable differential locking
settings; mechanical and electronically controlled limited-slip centre differential; helical
limited-slip front differential and TORSEN® limited-slip rear differential, steering angle
input sensor; multi-mode Vehicle Dynamics Control (VDC) stability and traction
control system with yaw sensor

Transmission
6-speed manual transmission
Gear ratios
1 3.636
2 2.235
3 1.521
4 1.137
5 0.971
6 0.756
R 3.545
Final drive 3.90

Chassis
Unitized body construction with Ring-Shaped Reinforcement Frame structure; high-
tensile steel reinforcements at key structural and suspension-mounting locations

Suspension
4-wheel independent, high-performance sport-tuned

Front
Inverted struts with forged aluminum-alloy lower A-arms, crossmember stiffener bar,
coil springs, stabilizer bar, STI designed components and geometry

Rear
Double-wishbone type with coil springs and damper units, stabilizer bar and STI
designed components and geometry

Brakes
Brembo Performance Brake System, power assisted 4-wheel disc with 4-channel, 4-
sensor Super-Sport Anti-lock Brake system (ABS) with g-sensor; Electronic Brake-
force Distribution (EBD), Brake Assist

Front disc
33 cm (13.0 in.) ventilated with four-piston fixed position calipers

Rear disc
32 cm (12.6 in.) ventilated with twin-piston fixed position calipers

Steering
Quick-ratio rack-and-pinion with engine-speed controlled variable power assist, load-
sensing valve, variable-capacity power steering pump and power steering fluid cooler

Ratio 15.0:1
Turns, lock-to-lock 2.8
Turning circle 36.1

Wheels
Std.: 18 x 8.5JJ BBS® forged-alloy

Tires
Std.: 245/40R18 93W Dunlop SP Sport 600 summer tire

Exterior Dimensions

Wheelbase 262 cm (103.3 in.)
Length 441 cm (173.8 in.)
Height 148 cm (58.1 in.)
Width 178 cm (70.7 in.)
Track (front/rear) 153 cm/154 cm (60.2 in./60.6 in.)

Ground clearance /Curb weight
15.5 cm (6.1 in.)
Curb weight
1,540 kg (3,395 lbs.)

Interior Dimensions

Headroom (f/r) 102 cm/95.5 cm (40.3 in./37.6 in.)
Legroom (f/r) 110.5 cm/85 cm (43.5 in./33.5 in.)
Hip room (f/r) 135.6 cm/135.4 cm (53.4 in./53.3 in.)
Shoulder room (f/r) 139 cm/135 cm (54.8 in./53.2 in.)

Cargo volume
Rear seat up: 0.54 cubic metres (19.0 cu. ft.)
Rear seat down: 1.25 cubic metres (44.4 cu. ft.)

EPA interior volume 94.4 cu. ft.


Fuel Economy (Est.)

City L/100km 16.4
(mpg) 17


Highway L/100km 12.2
(mpg) 23


Fuel tank capacity
64 litres (16.9 gal)
 
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