Page 9 of Subaru 2006 Impreza Brochure by Subaru Motors USA

Subaru Boxer Engine Transmission Impreza engines are constructed of aluminum alloy for reduced weight that helps quicken acceleration and handling. Enhanced with i-Active Valve Lift System in the 2.5i and Outback Sport, and Active Valve Control System in the WRX and WRX STI, for increased horsepower and a broader torque curve creating a virtually seamless supply of power. And they use Electronic Throttle Control (ETC) for a more precise and immediate response to the nuances of your right foot. It all works together to deliver exceptional power, along with proven reliability and durability. The fl ight path has cleared please fasten your seatbelt. Impreza WRX Limited Sedan shown in Crystal Gray Metallic. Manual transmission For those who prefer to row their own gears. Both the 5-speed of the 2.5i, Outback Sport and WRX, and the close-ratio 6-speed transmission of the WRX STI are fully synchronized to deliver smooth and precise shifts. The WRX STI unit is strengthened by a double-cone syncro in fi rst and a triple-cone syncro in second. Automatic transmission The electronic direct-control 4-speed automatic unit provides seamless shifts under a variety of driving conditions. The convenience of the automatic transmission is optional on most Impreza models. 2.5i and Outback Sport The aluminum-alloy 2.5-liter 4-cylinder engine utilizes a new computer-controlled i-Active Valve Lift System that increases horsepower to 173, and delivers a broader torque curve for seamless power. And it gets up to 22/29 mpg in city/highway driving. 1 WRX With a hood scoop to aid air intake to the intercooler, the new turbocharged 2.5-liter engine of the WRX delivers 230 potent horsepower. Peak torque of 235 lb-ft is reached at a low 3,600 rpm, thanks to the Active Valve Control System increasing overall breathability for more power throughout the rev range. Less vibration The 180-degree boxer engine layout allows the pistons to move in exact horizontal opposition, effectively negating the vibrations of the opposing pistons. Its smoothness not only sweetens power delivery, it helps increase longevity as well. 1 With 5-speed manual transmission.

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