Subaru Impreza (Hatchback) Impreza III Hatchback 2007,2008,2009,2010,2011 Specs
General information
Brand
Subaru
Model
Impreza (Hatchback)
Version
Impreza III Hatchback
Engine version
WRX STI 2.5 (305 Hp) AWD
Year production start
2007
Year production end
2011
Vehicle type
Hatchback
Horsepower RPM
305 Hp @ 6000 rpm.
Curb weight kg -lbs total
1395 kg
3075.45 lbs.
Overall length mm - inch
4415 mm
173.82 in.
Doors
5
Engine specs
Designation model
EJ257
Cam configuration
DOHC
Engine position and orientation
Front, Longitudinal
Cylinders
4
Position of cylinders
Boxer
Displacement (liters)
2457 cm3
149.94 cu. in.
Eng. horsepower RPM
305 Hp @ 6000 rpm.
Horsepower per litre
124.1 Hp/l
Weight / horsepower kg/hp - hp/tons
4.6 kg/Hp
218.6 Hp/tonne
Weight / torque kg/Nm - Nm/tons
3.5 kg/Nm, 281.7 Nm/tonne
3.5 kg/Nm
281.7 Nm/tonne
Torque Nm RPM lb-ft RPM
393 Nm @ 4400 rpm.
289.86 lb.-ft. @ 4400 rpm.
Bore (mm in)
99.5 mm
3.92 in.
Stroke (mm in)
79 mm
3.11 in.
Fuel delivery system
Multi-point indirect injection
Fuel type
Petrol (Gasoline)
Valvetrain
4
Engine aspiration
Turbocharger
Engine oil liters | quarts
4.3 l
4.54 US qt | 3.78 UK qt
Engine coolant
7.7 l
8.14 US qt | 6.78 UK qt
Emission certification
Euro 4
Powertrain architecture
Internal Combustion engine
Engine location
Front, Longitudinal
Transmission and Drive system
Drive configuration
All wheel drive (4x4)
Transmission
6
Brakes
Front brakes
Ventilated discs
Rear brakes
Disc
Anti-lock brake system
ABS (Anti-lock braking system)
Steering
Steering type
Steering rack and pinion
Turning diameter m - ft
10.6 m
34.78 ft.
Suspension
Front suspension
McPherson
Rear suspension
Several levers and rods
Body / Chassis
Wheels & Tyres
Wheels size
245/40 R18
Wheels rims
18
Exterior
Interior
Safety and Security
Passenger
Passengers seats
5
Trunk space max liter | cu. Ft.
538 l
19 cu. ft.
Dimensions
Overall length mm - inch
4415 mm
173.82 in.
Overall width mm -inch
1740 mm
68.5 in.
Overall height mm -inch
1475 mm
58.07 in.
Wheelbase mm - inch
2620 mm
103.15 in.
Track width front mm - inch
1495 mm
58.86 in.
Track width rear mm - inch
1500 mm
59.06 in.
Weights
Curb weight kg -lbs total
1395 kg
3075.45 lbs.
Fuel tank liters | gallons
60 l
15.85 US gal | 13.2 UK gal
Fuel economy
City l/100km - mpg
13.8 l/100 km
17.04 US mpg
Highway l/100 km - mpg
8.2 l/100 km
28.68 US mpg
Combined l/100 km - Mpg
10.3 l/100 km
22.84 US mpg
Autonomy km (combined use)
600
Engine type
4 CYLINDER - BOXER
What engine is the 4 cylinder boxer: the boxer-four is an engine where each pair
of opposed pistons moves inwards and outwards at the same time in two banks of
cylinders lying on opposite sides of a common crankshaft, named laso flat-four
or opposed-four.
What is the 4 cylinder boxer displacement: it is in a range between 1350 cc and
3000 cc in recent model line up powertrain.
How much is the power of the 4 cylinders boxer: the power of the 4 cylinders is
in a range from 98bhp to 365 bhp.Which cars use 4 cylinder boxer engine: 4 boxer is used by Porsche and Subaru but it has a strong heritage in powertrain production as have been used in cars by Volkswagen on the original iconic Beetle and Alfa Romeo.
The advantages of the boxer-four layout are perfect secondary vibration (resulting in minimal vibration), low centre of gravity and a short engine length. The layout also lends itself to efficient air cooling with the airflow being evenly distributed across the four cylinders. The downsides of boxer-four engines (compared with inline-four engines) are extra width, higher costs due to two cylinder heads instead of one and the long exhaust manifold required to achieve evenly spaced exhaust pulses.
The typical firing order for a boxer-four engine is for the left bank of cylinders to ignite one after another, followed by the right bank of cylinders with the firing interval evenly spaced at 180 degrees. The exhausts manifold from the two cylinders on each bank were merged and in result uneven exhaust pulses causing a characteristic "flat-four burble" exhaust sound as on Porsche 982 and 718 series with boxer 4.
The engine fires once every 180 degrees crankshaft angle (720 degrees divided by 4 = 180 degrees) and other common firing configuration (such as used by Subaru since the mid-2000s) is to pair the cylinders, with a firing interval of 360 degrees, in order to optimise the exhaust pulses. This configuration requires long exhaust manifolds to pair the cylinders on opposite banks and results in a less distinctive exhaust sound.
