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Mitsubishi 4G64 DOHC specs: 2.4L (146 ci) 4-cylinder, 86.5 x 100 mm (3.4055 x 3.9370 in) bore and stroke. Rated 160 hp, 1994. Used in the Mitsubishi Galant.
The Mitsubishi 4G64 DOHC is undersquare — the 3.937" stroke exceeds the 3.4055" bore by 13.5% — a layout that trades peak RPM for leverage and torque low in the range. The 3.937" stroke puts mean piston speed at 4,000 ft/min around 6,100 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.5 ci (598 cc).
It is one of 5 engines in the Mitsubishi 146ci family, all of them 146 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 146 ci / 2.4 L |
|---|---|
| Bore | 3.4055" |
| Stroke | 3.937" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.865 |
| Fuel type | gas |
|---|---|
| Advertised HP | 160 hp |
| Years | 1994 |
| Bore/stroke character | 0.865 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,937 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.5 ci |
Each link opens the calculator with this engine's specs already filled in.
1 factory vehicle, 1994. Each year opens that model's engine table.