2010 Subaru Impreza WRX STI Special Edition Road Test Specs | Edmunds

2010 Subaru Impreza - Road Test Specs

2010 Subaru Impreza Hatchback

(2.5L 4-cyl. Turbo AWD 6-speed Manual)


Model year2010
StyleWRX STI Special Edition 4dr Hatchback AWD (2.5L 4cyl Turbo 6M)
Base MSRP$33,690
Options on test vehicleNone
As-tested MSRP$33,690


Drive typeAll-wheel Drive
Engine typeTurbocharged, flat-4
Displacement (cc/cu-in)2,457cc (150 cu-in)
Block/head materialAluminum /aluminum
ValvetrainDOHC, four valves per cylinder, variable intake + exhaust-valve timing
Compression ratio (x:1)8.2
Redline (rpm)6,200
Horsepower (hp @ rpm)305 @ 6,000
Torque (lb-ft @ rpm)290 @ 4,000
Fuel typePremium unleaded (required)
Transmission typeSix-speed manual
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


Suspension, frontModified MacPherson strut
Suspension, rearDouble wishbone
Steering typePower steering
Steering ratio (x:1)15.0:1
Tire brandDunlop
Tire modelSP Sport 600
Tire typeSummer, high-performance
Tire size, frontP245/40R18 93W
Tire size, rearP245/40R18 93W
Wheel size18-by-8.5 inches front and rear
Wheel materialPainted alloy
Brakes, frontVentilated disc
Brakes, rearVentilated disc

Track Test Results

Acceleration, 0-30 mph (sec.)1.6
0-45 mph (sec.)3.3
0-60 mph (sec.)5.3
0-75 mph (sec.)7.8
1/4-mile (sec. @ mph)13.6 @ 98.3
0-60 with 1 foot of rollout (sec.)5.0
Braking, 30-0 mph (ft.)26
60-0 mph (ft.)106
Slalom, 6 x 100 ft. (mph)68.8
Skid pad, 200-ft. diameter (lateral g)0.93
Sound level @ idle (dB)49
@ Full throttle (dB)76.1
@ 70 mph cruise (dB)71.1

Test Driver Ratings & Comments

Acceleration commentsLaunching 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.
Braking ratingVery good
Braking commentsGood 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.
Handling ratingGood
Handling commentsSkid 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.

Testing Conditions

Elevation (ft.)383
Temperature (°F)54
Relative humidity (%)70
Wind (mph, direction)4, head/cross

Fuel Consumption

EPA fuel economy (mpg)17 city/23 highway/19 combined
Edmunds observed (mpg)17.7
Fuel tank capacity (U.S. gal.)16.9

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)3,395
Curb weight, as tested (lbs.)3,350
Weight distribution, as tested, f/r (%)58.3/41.7
Length (in.)173.8
Width (in.)70.7
Height (in.)58.1
Wheelbase (in.)103.3
Track, front (in.)60.2
Track, rear (in.)60.6
Turning circle (ft.)36.1
Legroom, front (in.)43.5
Legroom, rear (in.)33.5
Headroom, front (in.)40.3
Headroom, rear (in.)37.6
Shoulder room, front (in.)54.8
Shoulder room, rear (in.)53.2
Seating capacity5
Cargo volume (cu-ft)19.0
Max. cargo volume, seats folded (cu-ft)44.4


Bumper-to-bumper3 years/36,000 miles
Powertrain5 years/60,000 miles
Corrosion5 years/Unlimited miles
Roadside assistance3 years/36,000 miles


Front airbagsStandard
Side airbagsDual front
Head airbagsFront and rear
Antilock brakesFour-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlTraction control
Stability controlStability control
Tire-pressure monitoring systemTire-pressure monitoring
NHTSA crash test, driver5 stars
NHTSA crash test, passenger5 stars
NHTSA crash test, side front5 stars
NHTSA crash test, side rear4 stars
NHTSA rollover resistance4 stars
IIHS offsetNot tested

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