See other engines in this family
Toyota 5GR-FE specs: 2.5L (152.5 ci) 6-cylinder, 83 x 77 mm (3.2677 x 3.0315 in) bore and stroke, 10:1 compression. Rated 193 hp. Rod ratio and piston speed.
The Toyota 5GR-FE is oversquare — the 3.2677" bore exceeds the 3.0315" stroke by 7.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.0315" stroke does not reach 4,000 ft/min of mean piston speed until about 7,900 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 25.4 ci (417 cc).
10:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 11 engines in the GR V6 family, the smallest at 152.5 ci. Factory fitments include the Toyota Reiz (China), Toyota Crown (China).
| Displacement | 152.5 ci / 2.5 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.0315" |
| Cylinders | 6 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 1.078 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 193 hp |
| Bore/stroke character | 1.078 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,032 ft/min — conservative for a street engine |
| Displacement per cylinder | 25.4 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.