The Subaru Impreza III Sedan 2.5i, produced between 2008 and 2011, represented a significant evolution in Subaru’s popular compact car lineup. Positioned as a mainstream offering within the third-generation Impreza (GE/GH/GR/GV chassis codes), the 2.5i variant aimed to provide a balance of practicality, standard all-wheel drive, and reasonable performance for the everyday driver. This model year saw a shift away from the sportier image of previous Imprezas, focusing more on comfort and fuel efficiency while retaining Subaru’s core competency: symmetrical all-wheel drive. The 2.5i trim served as the primary entry point into the Impreza sedan range, offering a more accessible price point compared to the more powerful (and often turbocharged) WRX and STI models.
Technical Specifications
| Brand | Subaru |
| Model | Impreza |
| Generation | Impreza III Sedan |
| Type (Engine) | 2.5i (170 Hp) AWD |
| Start of production | 2008 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 8.2 kg/Hp, 121.9 Hp/tonne |
| Weight-to-torque ratio | 6.1 kg/Nm, 164.9 Nm/tonne |
| Power | 170 Hp @ 6000 rpm |
| Power per litre | 69.2 Hp/l |
| Torque | 230 Nm @ 4400 rpm (169.64 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EJ253 |
| 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.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant | 6.8 l (7.19 US qt | 5.98 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 | 4580 mm (180.31 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 (turning diameter) | 10.6 m (34.78 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Independent type McPherson |
| 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 | 205/55 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The heart of the Impreza 2.5i is the EJ253 2.5-liter naturally aspirated boxer-four engine. This engine, a hallmark of Subaru engineering, features horizontally opposed pistons, which contribute to a lower center of gravity and reduced engine vibration. The EJ253 utilizes a single overhead camshaft (SOHC) design per cylinder bank, operating 16 valves in total. Fuel delivery is managed by a multi-point fuel injection system, providing adequate atomization for efficient combustion. The engine’s 170 horsepower and 169.64 lb-ft of torque are respectable for its displacement, but it’s the engine’s smooth power delivery rather than outright performance that defines its character. The 5-speed manual transmission was standard, offering a direct connection to the engine and allowing drivers to fully utilize the available power.
Driving Characteristics
The Impreza 2.5i with the 5-speed manual transmission provides a reasonably engaging driving experience. While not a sports car, the engine delivers adequate acceleration for everyday driving situations. The all-wheel-drive system provides excellent traction in various weather conditions, a key selling point for Subaru. The gear ratios are well-spaced, allowing for comfortable cruising on the highway and sufficient power for passing maneuvers. Compared to the turbocharged WRX models, the 2.5i feels less urgent, but it offers a more predictable and linear power delivery. The manual transmission is light and precise, enhancing driver involvement.
Equipment & Trim Levels
The 2.5i trim typically included standard features such as air conditioning, power windows and locks, a basic audio system, and keyless entry. Safety features like anti-lock brakes (ABS) and front airbags were also standard. Optional extras included a sunroof, upgraded audio systems, and alloy wheels. Interior upholstery was typically cloth, with a functional and durable design. The dashboard layout was straightforward and easy to use, prioritizing practicality over luxury.
Chassis & Braking
The Impreza 2.5i utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable ride and predictable handling. The all-wheel-drive system distributes power to all four wheels, enhancing stability and traction. Braking duties are handled by ventilated discs up front and solid discs at the rear. The ABS system helps to prevent wheel lockup during hard braking, improving stopping performance and control. The suspension tuning is geared towards comfort, making it well-suited for daily commuting and long-distance driving.
Market Reception & Comparison
The Impreza 2.5i was generally well-received by automotive critics as a practical and reliable compact car. Its standard all-wheel drive was a major selling point, particularly in regions with inclement weather. Fuel economy was considered average for its class, and reliability was generally good. Compared to the more expensive WRX and STI models, the 2.5i offered a more affordable entry point into the Subaru brand. However, some critics noted that its performance was somewhat underwhelming compared to competitors with more powerful engines.
Legacy
The EJ253 engine, while not without its quirks (such as potential for head gasket issues in earlier iterations), proved to be a durable and reliable powerplant when properly maintained. The Impreza 2.5i remains a popular choice in the used car market, particularly for buyers seeking a dependable and all-weather capable vehicle. Its relatively simple mechanical design makes it easier and less expensive to maintain compared to more complex modern vehicles. The 2008-2011 Impreza 2.5i represents a transitional period for the Impreza, moving away from its rally-inspired roots towards a more mainstream and practical compact car.
