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ENGINE AND DRIVETRAIN
Engine 2.5-liter SOHC aluminum-alloy 16-valve 2.0-liter DOHC intercooled, turbocharged 2.5-liter DOHC aluminum-alloy 16-valve 4-cylinder
horizontally opposed 4-cylinder aluminum-alloy 16-valve 4-cylinder horizontally horizontally opposed Subaru Boxer engine with
Subaru Boxer engine. opposed Subaru Boxer engine. Active Valve Control System (AVCS). Sodium-filled
Platinum-tipped spark plugs. Platinum-tipped spark plugs. exhaust valves. Iridium spark plugs.
Power 165 hp @ 5,600 rpm 227 hp @ 6,000 rpm 300 hp @ 6,000 rpm
Torque 166 lb.-ft. @ 4,000 rpm 217 lb.-ft. @ 4,000 rpm 300 lb.-ft. @ 4,000 rpm
Compression ratio 10.0:1 8.0:1 8.2:1
Bore and stroke 99.5 x 79 mm 92 x 75 mm 99.5 x 79 mm
Intake system Aluminum-alloy intake manifold. Aluminum-alloy intake manifold. Turbocharger Aluminum-alloy intake manifold. High boost turbo-
with intercooler. charger with large-capacity intercooler. Driver-
Maximum boost pressure: 13.5 psi. controlled intercooler water-spray cooler.
Maximum boost pressure: 14.5 psi
Fuel and ignition system Sequential multi-port fuel injection. Electronic Throttle Control (ETC). Engine management with integrated self-diagnostics and adaptive driving habits
capability. Distributorless electronic ignition – 2.5 RS and Outback Sport models. Direct ignition – WRX and WRX STi models.
Manual transmission Standard fully synchronized 5-speed manual with Standard fully synchronized 5-speed manual with Standard fully synchronized close-ratio 6-speed
clutch pedal-controlled starter interlock. clutch pedal-controlled starter interlock. manual with clutch pedal-controlled starter interlock.
Automatic transmission Optional 4-speed electronic direct-control Optional 4-speed electronically controlled Not available.
automatic with Economy and Power modes. automatic with Economy and Power modes.
Fuel economy (city/highway) Manual: 23/30 mpg, Automatic: 22/28 mpg Manual: 20/27 mpg, Automatic: 19/26 mpg Manual: 18/24 mpg
SYMMETRICAL ALL-WHEEL DRIVE
Continuous All-Wheel Drive Models equipped with 5-speed manual transmission utilize a viscous-type locking center differential with torque distribution configured at a 50/50-split
front-to-rear. WRX models also feature a viscous-type limited-slip rear differential.
Active All-Wheel Drive Models equipped with 4-speed automatic transmission utilize an electronically controlled variable transfer clutch to distribute power to where traction is needed.
Sensors monitor parameters such as wheel slippage, throttle position and braking to help determine torque distribution to the wheels with optimum traction.
Variable Torque Distribution (VTD) WRX models equipped with 4-speed automatic transmission utilize an electronically controlled variable transfer clutch in conjunction with a planetary-type
All-Wheel Drive center differential. Rear wheel-biased torque distribution normally configured at 45/55-split front-to-rear. VTD also features a viscous-type limited-slip
rear differential.
Driver Controlled Center Differential Exclusive to the WRX STi, Driver Controlled Center Differential (DCCD) All-Wheel Drive, featuring both manual and automatic modes, uses an electronically
(DCCD) All-Wheel Drive managed multi-plate transfer clutch in conjunction with a planetary gear-type center differential to control power distribution between the front and rear
wheels. Normally, DCCD splits power 35% front and 65% rear. DCCD also features a helical-type limited-slip front differential and mechanical limited-slip
rear differential.
CHASSIS
Steering Engine-speed-sensing variable power-assisted rack-and-pinion. Engine-speed-sensing quick-ratio variable power-
Turns lock-to-lock: 3.0 (2.5 RS Sport Wagon: 3.2). assisted rack-and-pinion. Power-steering oil cooler.
Turning circle: 35.4 ft. (2.5 RS Sport Wagon 33.5 ft.). Turns lock-to-lock: 2.6. Turning circle: 37.4 ft.
Suspension 2.5 RS and WRX: Outback Sport: WRX STi:
Sport-tuned 4-wheel independent suspension. 4-wheel independent heavy-duty raised suspension. High-performance sport-tuned 4-wheel independent
Front: Strut-type with multiple-phase valve damping Front: Strut-type with multiple-phase valve damping suspension. Front: Inverted strut-type with aluminum-
and lower L-arm. Rear: Strut-type with multiple- and lower L-arm. Rear: Strut-type with multiple- alloy lower L-arm. Rear: Inverted strut-type with
phase valve damping and parallel link. Front and phase valve damping and parallel link. Front and parallel link. Front and rear stabilizer bars.
rear stabilizer bars. rear stabilizer bars.
Brakes 4-wheel disc, ventilated front. 4-wheel disc, ventilated front. Brembo performance brake system.
4-wheel disc, ventilated front and rear.
4-channel, 4-sensor ABS with Electronic Brake-force Distribution (EBD). 4-channel, 4-sensor Super Sport ABS with
Electronic Brake-force Distribution (EBD).
Brake discs (in.) 10.8 front/10.3 rear 11.4 front/10.3 rear 12.7 front/12.3 rear
WHEELS AND TIRES
Wheels 16 x 6.5-inch 5-spoke aluminum-alloy. Silver finish. 16 x 6.5-inch 5-twin-spoke aluminum-alloy. 17 x 8.0-inch 10-spoke BBS lightweight
(7-spoke on Outback Sport) Smoke-silver finish. aluminum-alloy. Silver or Gold finish.
Tires 205/55 R16 89V performance all-season 205/55 R16 89V performance all-season 225/45 R17 90W ultra high-performance
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DIMENSIONS Sedans Sport Wagons
Length 173.8 in. 173.8 in.
Height 56.7 in. (WRX STi: 56.3 in.) 58.5 in. including roof rails (Outback Sport: 60.6 in. including roof rails and cross bars)
Width 68.5 in. 66.7 in. (Outback Sport: 67.3 in.)
Wheelbase 99.4 in. (WRX STi: 100.0 in.) 99.4 in.
Track (front/rear) 58.5 in./58.3 in. (WRX STi: 58.7 in./58.9 in.) 57.7 in./57.3 in. (Outback Sport: 57.5 in./57.3 in.)
2.5 RS Sedan: WRX Sedan: WRX STi Sedan: 2.5 RS Sport Wagon: WRX Sport Wagon: Outback Sport Wagon: Outback Sport Wagon Special Edition:
Curb weight (manual/automatic) 2,972 lbs.
2
/3,024 lbs.
2
3,085 lbs.
3
/3,140 lbs.
3
3,298 lbs./N/A 3,062 lbs./3,110 lbs. 3,165 lbs./3,220 lbs. 3,058 lbs./3,110 lbs. 3,058 lbs./3,110 lbs.
Coefficient of drag (cd) 0.33 0.34 (WRX and Outback Sport: 0.37)
Headroom (front/rear) 38.6 in./36.7 in.(WRX with Premium Package: 36.3 in./36.6 in.) 39.7 in./37.3 in.
Legroom (front/rear) 42.9 in./33.0 in. 42.9 in./33.7 in.
Shoulder room (front/rear) 52.7 in./52.9 in. 52.7 in./52.9 in.
Cabin capacity 87.6 cu. ft. 90.4 cu. ft.
Cargo capacity 11.0 cu. ft. 27.9 cu. ft./61.6 cu. ft. with rear seat lowered
Impreza 2.5 RS Sedan Outback Sport Impreza WRX Sedan Impreza WRX STi
and Sport Wagon Wagons and Sport Wagon Sedan
SPECIFICATIONS