Technical specifications
| Manufacturer | Subaru, Fuji Heavy Industries, Japan, from 2004 to 2012 |
| Type | EJ257 |
| Description | boxer 4-cylinder engine, cylinder block, heads and pistons made of aluminium alloy |
| Stroke | 79 mm |
| Bore | 99.5 mm |
| Displacement | 2457 cm³ |
| Compression ratio | 8.71 |
| Power | 300 hp at 6000 rpm |
| Torque | 407 Nm at 4000 rpm |
| Specific power | 122.1 hp/litre |
| Valvetrain system | 4 valves per cylinder with hydraulic tappets, controlled by two overhead camshafts in each head, with intake variable timing system, driven by toothed belts |
| Fuel feeding system | multipoint port fuel (gasoline) injection operated by an electronic control system |
| Supercharging system | exhaust gas turbocharger IHI with and air-to-air cooler |
| Ignition system | one spark plug and one ignition coil per cylinder, controlled by an integrated (ignition-injection) electronic system |
| Cooling system | liquid-fed by a centrifugal pump |
| Lubrication system | forced by a gear pump |
| Mass | 120 kg |
