ENGINE AND DRIVETRAIN

2.5-liter DOHC turbocharged engine

2.5-liter DOHC Intercooled, turbocharged aluminum-alloy 16-valve 4-cylinder horizontally opposed SUBARU BOXER® engine with Active Valve Control System (AVCS)

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Power: 265 hp @ 6000 rpm

WRX Premium, WRX Limited

 

Torque: 244 lb-ft @ 4400 rpm

WRX Premium, WRX Limited

 

Power: 305 hp @ 6000 rpm

WRX STI, WRX STI Limited

 

Torque: 290 lb-ft @ 4000 rpm

WRX STI, WRX STI Limited

 

Bore and stroke: 99.5 x 79.0 mm

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Turbocharger with intercooler

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Maximum boost pressure: 14.2 psi.

WRX Premium, WRX Limited

 

Maximum boost pressure: 14.7 psi.

WRX STI, WRX STI Limited

 

Sequential multiport fuel injection.

Sequential multiport fuel injection, Electronic Throttle Control (ETC), Direct ignition.

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Subaru Intelligent Drive (SI-DRIVE)

SI-DRIVE enables three distinctively different modes of vehicle performance characteristics by regulating the Engine Control Unit (ECU) and by fine-tuning the electronically controlled throttle.

WRX STI, WRX STI Limited

 

Fully-synchronized 5-speed manual transmission

Fully-synchronized 5-speed manual with Incline Start Assist

WRX Premium, WRX Limited

 

Fully-synchronized close-ratio 6-speed manual transmission

Fully-synchronized close-ratio 6-speed manual with Incline Start Assist

WRX STI, WRX STI Limited

 

STABILITY AND TRACTION

Symmetrical All-Wheel Drive

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Driver Controlled Center Differential (DCCD) All-Wheel Drive

Exclusive to WRX STI, DCCD All-Wheel Drive uses an electronically managed multi-plate transfer clutch and a mechanical limited-slip differential in conjunction with a planetary-gear-type center differential to control power distribution between the front and rear wheels. Featuring manual and three automatic modes, DCCD splits power 41% front and 59% rear. Sensors monitor parameters such as wheel slippage, steering angle, throttle position and braking to help determine torque distribution and direct it to the wheels with optimum traction. DCCD also features a limited-slip helical front and Torsen® rear differential.

WRX STI, WRX STI Limited

 

Vehicle Dynamics Control (VDC)

VDC electronic stability control utilizes sensors which constantly monitor wheel speed, steering angle, brake pressure, vehicle yaw rate and lateral g-forces. If VDC detects a difference between the driver's intended path and the one the vehicle is actually taking, VDC applies braking power and/or reduces engine torque to help correct vehicle path. Exclusive to WRX STI, VDC features Standard, Off and Performance-oriented Traction modes.

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Traction Control System (TCS)

VDC also incorporates an all-wheel, all-speed TCS which, when sensing a loss of traction, applies braking force and reduces engine torque to the slipping wheel or wheels as necessary to maintain vehicle motion.

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

FUEL

Fuel economy** (hwy/city): 25/19 MPG

WRX Premium, WRX Limited

 

Fuel economy** (hwy/city): 23/17 MPG

WRX STI, WRX STI Limited

 

Fuel requirement: Premium unleaded gasoline (91 octane)

Premium unleaded gasoline (91 octane) required. 93 octane recommended (WRX STI).

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

CHASSIS

Power-assisted rack-and-pinion steering

Power-assisted rack-and-pinion steering, turning circle: 36.1 ft

WRX Premium, WRX Limited, WRX STI, WRX STI Limited

 

Sport-tuned 4-wheel independent suspension

Front: strut-type with lower L-arm, stabilizer bar; Rear: double wishbone, stabilizer bar

WRX Premium, WRX Limited

 

High-performance sport-tuned 4-wheel independent suspension

Front: inverted strut-type with aluminum-alloy lower L-arm and pillow-ball joint mount, stabilizer bar; Rear: double wishbone, stabilizer bar

WRX STI, WRX STI Limited

 

4-wheel disc, ventilated front brakes.

Dual-piston front and single-piston rear calipers, 4-channel, 4-sensor ABS with Electronic Brake-force Distribution (EBD); Front: 11.6 inches/Rear: 11.3 inches

WRX Premium, WRX Limited

 

Brembo® performance braking system

4-wheel disc, ventilated front and rear. 4-piston front and dual-piston rear calipers. 4-channel, 4-sensor Super Sport ABS with Electronic Brake-force Distribution (EBD); Front: 13.0 inches/Rear: 12.6 inches

WRX STI, WRX STI Limited

 

Brake Assist

When emergency braking is detected by how quickly the brake pedal is pressed, maximum brake pressure is immediately applied.

WRX Premium, WRX Limited, WRX STI, WRX STI Limited