General Information -- STI: Impreza: Engine
ENGINE SPECIFICATION
| Model | 2.5 L Turbo | |
| Engine type | Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine | |
| Valve arrangement | DOHC | |
| Bore x stroke | mm (in) | 99.5x79 (3.92x3.11) |
| Displacement | cm3 (cu in) | 2,457 (149.94) |
| Compression ratio | 8.2 | |
| Ignition order | 1 - 3 - 2 - 4 | |
| Idle speed | RPM | 700 |
| Maximum output | kW (HP)/RPM | 227 (305)/6,000 |
| Maximum torque | N.m (kgf-m, ft-lb)/RPM | 394 (40.2, 290)74,000 |