The Subaru Impreza III Hatchback 2.5i, produced between 2007 and 2011, represented a significant evolution in Subaru’s compact car lineup. Positioned as a practical and capable all-weather vehicle, the 2.5i variant, equipped with a 2.5-liter naturally aspirated engine and a four-speed automatic transmission, aimed to provide a balance of performance and convenience. This model year marked the third generation of the Impreza (GE/GH chassis codes), and the hatchback body style offered increased cargo versatility compared to the sedan. It was a key offering in the North American market, where Subaru’s symmetrical all-wheel drive system was highly valued.
Technical Specifications
| Brand | Subaru |
| Model | Impreza |
| Generation | Impreza III Hatchback |
| Type (Engine) | 2.5i (170 Hp) AWD Automatic |
| Start of production | 2007 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 11.8 l/100 km (19.9 US mpg) |
| Fuel consumption (extra urban) | 8.7 l/100 km (27 US mpg) |
| 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 |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 8.2 kg/Hp |
| Weight-to-torque ratio | 6 kg/Nm |
| 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 capacity | 6.7 l (7.08 US qt | 5.9 UK qt) |
| Kerb Weight | 1390 kg (3064.43 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 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 | 4 |
| Gearbox type | automatic 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 2.5i Impreza was the EJ253 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 EJ253 featured a single overhead camshaft (SOHC) design per cylinder bank, operating four valves per cylinder. Fuel delivery was handled by a multi-point fuel injection system. The engine produced 170 horsepower at 6000 rpm and 230 Nm (169.64 lb-ft) of torque at 4400 rpm. Paired with this engine was a four-speed automatic transmission, designed for smooth and relatively fuel-efficient operation. While not a performance-oriented transmission, it provided ease of use for everyday driving. The transmission was electronically controlled, adapting shift points based on throttle input and driving conditions.
Driving Characteristics
The 2.5i automatic Impreza offered a comfortable and predictable driving experience. Acceleration from 0-60 mph was achieved in around 5.5 to 5.8 seconds, respectable for a compact car of its time, but noticeably slower than the manual transmission or more powerful turbocharged variants. The automatic transmission, while convenient, did result in some power loss compared to the five-speed manual. The gear ratios were tuned for fuel economy and smooth cruising, rather than aggressive acceleration. Subaru’s symmetrical all-wheel drive system provided excellent traction in various weather conditions, making the 2.5i a capable vehicle year-round. The Boxer engine’s low center of gravity contributed to stable handling, although the suspension was tuned more for comfort than sporty handling.
Equipment & Trim Levels
The 2.5i trim level generally included standard features such as air conditioning, power windows and locks, keyless entry, and a basic audio system with CD player. Higher trim levels, often denoted with designations like “Premium,” added features like alloy wheels, a sunroof, upgraded audio systems, and heated front seats. Interior upholstery typically consisted of cloth, with leather options available on higher trims. The dashboard layout was functional and straightforward, prioritizing ease of use. Optional extras included a navigation system and a premium sound system.
Chassis & Braking
The Impreza III Hatchback utilized a MacPherson strut front suspension and a multi-link rear suspension. This setup provided a good balance of ride comfort and handling. The 2.5i model typically featured ventilated disc brakes on the front wheels and solid disc brakes on the rear. Anti-lock braking system (ABS) was standard, enhancing safety. The chassis was designed to be rigid, contributing to the car’s overall stability. Stabilizer bars were included on both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 2.5i automatic Impreza was generally well-received as a practical and reliable all-weather vehicle. Critics praised its standard all-wheel drive system and comfortable ride. However, the four-speed automatic transmission was sometimes criticized for being outdated compared to transmissions with more gears offered by competitors. Fuel economy was average for its class, with the urban cycle showing 11.8 l/100km (19.9 US mpg). Compared to the turbocharged WRX and STI models, the 2.5i offered significantly less performance but was more affordable and fuel-efficient. Compared to the 2.5i manual transmission variant, the automatic version offered less driver engagement but greater convenience.
Legacy
The EJ253 engine, while generally reliable, is known to be susceptible to head gasket failures, a common issue with earlier Subaru Boxer engines. Regular maintenance, including timely coolant changes, is crucial to prevent this issue. The four-speed automatic transmission is also relatively reliable, but may require servicing as it ages. Today, the 2007-2011 Impreza 2.5i Hatchback represents an affordable entry point into Subaru ownership. Its all-wheel drive system and practical hatchback body style continue to appeal to buyers seeking a dependable and versatile vehicle, particularly in regions with inclement weather. The car’s relatively simple mechanical design makes it a viable option for DIY mechanics, and parts availability remains good.
