The Subaru Impreza III Hatchback WRX 2.5, produced between 2007 and 2011, represented a significant evolution in Subaru’s rally-bred performance compact. Positioned as the higher-performance variant within the third-generation Impreza (GE/GH/GR/GP) lineup, the WRX 2.5 aimed to deliver accessible all-wheel-drive performance. It built upon the foundation of the standard Impreza hatchback, offering a more potent engine, upgraded suspension, and distinctive styling cues. This model was primarily sold in markets like North America, Europe, and Australia, where the demand for practical, all-weather performance vehicles was strong. The Impreza WRX 2.5 competed with rivals like the Mitsubishi Lancer Evolution, Volkswagen Golf GTI, and various front-wheel-drive hot hatches.
Technical Specifications
| Brand | Subaru |
| Model | Impreza |
| Generation | Impreza III Hatchback |
| Type (Engine) | WRX 2.5 (230 Hp) AWD |
| Start of production | 2007 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 14.3 l/100 km (16.4 US mpg, 19.8 UK mpg, 7 km/l) |
| Fuel consumption (extra urban) | 8.2 l/100 km (28.7 US mpg, 34.4 UK mpg, 12.2 km/l) |
| Fuel consumption (combined) | 10.4 l/100 km (22.6 US mpg, 27.2 UK mpg, 9.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 209 km/h (129.87 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.1 kg/Hp, 164.9 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 229.4 Nm/tonne |
| Power | 230 Hp @ 5200 rpm |
| Power per litre | 93.6 Hp/l |
| Torque | 320 Nm @ 2800 rpm (236.02 lb.-ft. @ 2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EJ255 |
| Engine displacement | 2457 cm3 (149.94 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Boxer |
| Cylinder Bore | 99.5 mm (3.92 in.) |
| Piston Stroke | 79 mm (3.11 in.) |
| Compression ratio | 8.4:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1395 kg (3075.45 lbs.) |
| Trunk (boot) space – maximum | 538 l (19 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Length | 4415 mm (173.82 in.) |
| Width | 1740 mm (68.5 in.) |
| Height | 1475 mm (58.07 in.) |
| Wheelbase | 2620 mm (103.15 in.) |
| Front track | 1495 mm (58.86 in.) |
| Rear (Back) track | 1500 mm (59.06 in.) |
| Minimum turning circle | 10.6 m (34.78 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Rear suspension | Several levers and rods |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 205/50 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The heart of the Impreza WRX 2.5 was the EJ255 2.5-liter turbocharged boxer-four engine. This engine was a departure from the earlier 2.0-liter EJ20 engines found in previous WRX models, offering increased displacement and torque. The EJ255 featured a closed-deck engine block for enhanced strength, a single-scroll turbocharger with intercooling, and multi-point fuel injection. The engine’s horizontally opposed configuration (boxer) contributed to a low center of gravity, improving handling characteristics. The 5-speed manual transmission was standard, delivering power to all four wheels via Subaru’s symmetrical all-wheel-drive system. This system utilized a variable torque distribution, automatically adjusting power delivery between the front and rear axles based on road conditions and driver input.
Driving Characteristics
The 230 horsepower and 236 lb-ft of torque provided by the EJ255 engine delivered brisk acceleration. The 0-60 mph sprint was typically achieved in around 5.5 seconds. While not as razor-sharp as the later STI models, the WRX 2.5 offered a compelling blend of performance and usability. The turbocharger provided a noticeable surge of power in the mid-range, making it well-suited for everyday driving and spirited backroad excursions. The all-wheel-drive system provided excellent traction in various weather conditions, enhancing stability and confidence. The 5-speed manual transmission offered precise shifts, although some reviewers noted that the gear ratios were spaced somewhat widely.
Equipment & Trim Levels
The WRX 2.5 typically came standard with features such as alloy wheels, sport seats, a leather-wrapped steering wheel, and air conditioning. Optional extras included a sunroof, premium audio system, and upgraded interior trim. The interior design was functional and driver-focused, with clear instrumentation and supportive seats. The hatchback body style offered good cargo space for a compact car, making it a practical choice for daily use.
Chassis & Braking
The Impreza WRX 2.5 featured a reinforced chassis and a sport-tuned suspension. The front suspension utilized MacPherson struts, while the rear employed a multi-link setup. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. Braking duties were handled by ventilated disc brakes at all four corners, providing ample stopping power. The ABS (Anti-lock Braking System) was standard, enhancing safety and control.
Market Reception & Comparison
The Impreza WRX 2.5 was generally well-received by automotive critics. It was praised for its performance, all-wheel-drive capability, and practicality. However, some reviewers noted that the engine lacked the responsiveness of the earlier EJ20 engines and that the fuel economy was relatively poor (around 22.6 US mpg combined). Compared to the higher-performance STI model, the WRX 2.5 offered a more affordable entry point into the world of Subaru performance. It also provided a more comfortable ride and was less demanding to drive on a daily basis.
Legacy
The EJ255 engine, while not without its quirks, proved to be a relatively reliable powerplant when properly maintained. Common issues included oil consumption and potential for head gasket failure, particularly if the engine was heavily modified. Today, the Impreza WRX 2.5 remains a popular choice among enthusiasts seeking an affordable and capable all-wheel-drive performance car. Its combination of practicality, performance, and rally-inspired heritage continues to appeal to a dedicated following. Well-maintained examples command reasonable prices in the used car market, and the platform remains popular for modification and tuning.
