WRX STI Special Edition 4dr Hatchback AWD (2.5L 4cyl Turbo 6M)
Options on test vehicle
2,457cc (150 cu-in)
DOHC, four valves per cylinder, variable intake + exhaust-valve timing
Compression ration (x:1)
Horsepower (hp @ rpm)
305 @ 6,000
Torque (lb-ft @ rpm)
290 @ 4,000
Transmission and axle ratios (x:1)
I - 3.64, II - 2.24, III - 1.52, IV - 1.14, V - 0.97, VI - 0.76, final drive - 3.90
Launching an STI is always a clutch-killing endeavor because it cannot spin the tires. Slow-reacting tach makes 1-2 shift a bit of a guessing game. If you get greedy, the rev-limiter/fuel cut-off punishes acceleration numbers. Shifter is notchy and 3ird gear feels needlessly tall.
Good initial bite, some dive but steady, straight stops with good fade resistance. The distances are highly susceptible to surface conditions such as dips and hops.
Skid pad: Very good balance with ESP off with an ability to steer with the throttle. But not with much precision due to turbo lag and constantly adjusting differentials. The circle becomes an octagon with on/off throttle. With ESP on the car stays tighter to the desired line and requires less work. Slalom: While the STI no longer flops around on its too-soft suspension with good tires, it now stays flatter and works the tires much harder. Understeer is no longer the limiting factor, but now it slides all four tires as a unit. Timing the suspension wind-up, diff reaction and turbo lag is a big chore that results in good, but not easily repeatable runs of around 70 mph.