The Subaru Impreza II 2.5, produced between 2000 and 2002, represented a significant evolution of Subaru’s popular compact car. Falling within the second generation of the Impreza (GJ chassis), this variant was distinguished by its 2.5-liter naturally aspirated boxer engine producing 165 horsepower. Positioned as a mid-range offering, it bridged the gap between the base 2.2-liter models and the performance-oriented turbocharged WRX variants. The 2.5-liter Impreza II aimed to provide a balance of practicality, fuel efficiency, and all-weather capability, appealing to a broader customer base than its more focused siblings. It was primarily sold in North America, Europe, and Australia, where Subaru’s all-wheel-drive system was highly valued.
Technical Specifications
| Brand | Subaru |
| Model | Impreza |
| Generation | Impreza II |
| Type (Engine) | 2.5 (165 Hp) AWD |
| Start of production | 2000 year |
| End of production | 2002 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (EPA) | 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 8.4 l/100 km (28 US mpg, 33.6 UK mpg, 11.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.2 kg/Hp, 122.7 Hp/tonne |
| Weight-to-torque ratio | 6 kg/Nm, 167.3 Nm/tonne |
| Power | 165 Hp @ 5600 rpm |
| Power per litre | 67.2 Hp/l |
| Torque | 225 Nm @ 4000 rpm (165.95 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EJ251 |
| 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 | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 4 l (4.23 US qt | 3.52 UK qt) |
| Coolant | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1345 kg (2965.22 lbs.) |
| Trunk (boot) space – minimum | 311 l (10.98 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Permitted trailer load with brakes (12%) | 907 kg (1999.59 lbs.) |
| Length | 4405 mm (173.43 in.) |
| Width | 1730 mm (68.11 in.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2525 mm (99.41 in.) |
| Front track | 1485 mm (58.46 in.) |
| Rear (Back) track | 1475 mm (58.07 in.) |
| Ride height (ground clearance) | 150 mm (5.91 in.) |
| Minimum turning circle (turning diameter) | 10.8 m (35.43 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent coil spring, Transverse stabilizer |
| Front brakes | Ventilated discs, 272 mm |
| Rear brakes | Disc, 262 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 6.5J x 16 |
Powertrain & Engine Architecture
The heart of the Impreza II 2.5 was the EJ251 engine, a 2.5-liter horizontally opposed (boxer) four-cylinder. This engine design, a Subaru hallmark, offered a low center of gravity, contributing to the car’s balanced handling. The EJ251 featured a single overhead camshaft (SOHC) valvetrain operating four valves per cylinder. Fuel delivery was handled by a multi-port fuel injection system. The engine’s 165 horsepower and 166 lb-ft of torque were respectable for its time, providing adequate performance for everyday driving. The engine was paired with a five-speed manual transmission as standard. The transmission was chosen for its durability and relatively direct feel, complementing the engine’s characteristics. The engine code, EJ251, is crucial for identifying specific parts and maintenance requirements.
Driving Characteristics
The 2.5-liter Impreza II offered a comfortable and predictable driving experience. While not as exhilarating as the turbocharged WRX models, it provided sufficient power for merging onto highways and passing other vehicles. The all-wheel-drive system delivered excellent traction in various weather conditions, a key selling point for Subaru. The five-speed manual transmission allowed for precise control over the engine’s powerband. Compared to the WRX, the 2.5-liter model had a more relaxed and refined feel, prioritizing comfort over outright performance. The gear ratios were tuned for fuel efficiency and everyday usability, rather than aggressive acceleration. The boxer engine’s unique firing order contributed to a distinctive engine note and smooth power delivery.
Equipment & Trim Levels
The Impreza II 2.5 typically came standard with features such as air conditioning, power windows and locks, and an AM/FM stereo. Higher trim levels offered options like a sunroof, upgraded audio systems, and alloy wheels. Interior upholstery was typically cloth, with options for leather in some markets. The dashboard layout was functional and straightforward, prioritizing ease of use. Safety features included dual front airbags and ABS brakes. The specific trim levels and available options varied depending on the region.
Chassis & Braking
The Impreza II utilized a McPherson strut front suspension and an independent coil spring rear suspension. This setup provided a good balance of ride comfort and handling precision. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering. The braking system consisted of ventilated discs at the front and solid discs at the rear. ABS was standard, enhancing braking performance and stability. The chassis was designed to be robust and durable, capable of handling the demands of all-wheel-drive operation.
Market Reception & Comparison
The Impreza II 2.5 was generally well-received by automotive critics as a practical and reliable all-wheel-drive sedan. It was praised for its comfortable ride, spacious interior, and excellent traction. However, some reviewers noted that its performance was not as exciting as the turbocharged WRX models. Fuel economy was considered average for its class. Compared to other compact sedans of the time, the Impreza II 2.5 offered a unique combination of all-wheel-drive capability and affordability. It was often compared to vehicles like the Honda Civic, Toyota Corolla, and Mazda Protegé.
Legacy
The EJ251 engine, while not as iconic as the turbocharged EJ20 variants, proved to be a durable and reliable powerplant. Impreza II 2.5 models are still found on the used car market today, often prized for their affordability and all-weather capability. Common maintenance issues include oil leaks and occasional head gasket failures, typical for older Subaru boxer engines. However, with proper maintenance, these vehicles can provide many years of reliable service. The Impreza II 2.5 represents a significant chapter in Subaru’s history, demonstrating the brand’s commitment to all-wheel-drive technology and practical, dependable transportation.
