| Model |
2.5 L turbo (WRX-S, WRX model) |
2.5 L high power turbo (STI-S, STI, SE model) |
| Engine type |
Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine |
| Valve arrangement |
DOHC |
| Bore x stroke |
mm (in) |
99.5 x 79.0 (3.92 x 3.11) |
| Displacement |
cm3
(cu in) |
2, 457 (149.94) |
| Compression ratio |
8.4 |
8.2 |
| Ignition order |
1 - 3 - 2 - 4 |
| Idle speed |
RPM |
700±100 |
| Maximum output |
kW (HP)/rpm |
198 (265)/6, 000 |
227 (305)/6, 000 |
| Maximum torque |
N.m (kgf-m, ft-lb)/rpm |
330 (33.7, 244)/4, 000 |
394 (40.2, 290)/4, 000 |