Subaru Impreza WRX I Manuel d'utilisateur télécharger pdf (Page 7)

Power

For generations, the Impreza WRX and WRX STI have outpaced

the compromises of a conventional approach. Their famed

SUBARU BOXER

engine is intensiﬁ ed with enhancements that

make every ﬁ ring of its spark plugs an explosion of emotion.

Every breath is rush-delivered via intercooled turbocharging.

The resulting torque and horsepower race to all four wheels

with maximum efﬁ ciency for throttle response that reminds

you every time why you love to drive.

Turbocharger

If it’s a WRX or an STI, its not-so-secret weapon

is a turbocharger that helps to generate 265

force-fed horsepower for the WRX, and a

whopping 305 horsepower for the STI. As

always, the signature hood scoop is the real deal,

supplying airﬂ ow to a lightweight intercooler

that boosts output and response by enhancing

the turbocharger’s ability to deliver a potent fuel

and air mixture.

Subaru Boxer Engine

With pistons laid flat, the SUBARU BOXER

engine offers drivers unique advantages. The

pistons’ movement helps reduce vibration for

revs that come on buttery smooth. And the

layout boasts a flatter profile and helps create

a lower center of gravity for the entire car—

increasing balance and stability for cornering

characteristics that are one-of-a-kind.

Active Valve Control System

While turbocharging boosts power by pumping

more air into each cylinder, the Subaru Active

Valve Control System (AVCS) on the WRX and

Dual Active Valve Control System (DAVCS) on the

STI make sure to deliver the air at precisely the

right moment. Valve timing is adjusted to match

engine rpm, for better response at any speed.

Horsepower

GENTLEMEN, START YOUR DYNAMOMETERS

It’s not just what you’ve got; it’s how you use it. With an enhanced

horsepower rating of 265, the 2009 WRX gives you a lot to work with.

But follow the torque chart and you’ll see the ability of the WRX to

turn power into acceleration. Torque peaks at 244 lb-ft—more than

any previous WRX—and continues over a wide power band. It’s a

punch that takes WRX from 0–60 mph in just 5.4 seconds.

But you

won’t need a dyno, or even a stopwatch to appreciate it.

WRX 4-door in WR Blue Mica.

POWER

(

)

265

TORQUE

(

lb-ft

)

244

1 Based on manufacturer’s testing.

RPM

300

250

200

150

100

300

250

200

150

100

1000 3000 5000 7000

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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Subaru Impreza WRX I Manuel d'utilisateur Page 7

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