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Toyota 3RZ-FE specs: 2.7L (164.4 ci) 4-cylinder, 95 x 95 mm (3.7402 x 3.7402 in) bore and stroke. DOHC. Rod ratio and piston speed worked out.
The Toyota 3RZ-FE is exactly square — 3.7402" bore and 3.7402" stroke are the same — which splits the difference between a high-revving layout and a torque layout. The 3.7402" stroke puts mean piston speed at 4,000 ft/min around 6,400 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 41.1 ci (674 cc).
It is one of 4 engines in the RZ family, the largest at 164.4 ci.
| Displacement | 164.4 ci / 2.7 L |
|---|---|
| Bore | 3.7402" |
| Stroke | 3.7402" |
| Cylinders | 4 |
| Bore/stroke ratio | 1 |
| Valvetrain | DOHC |
|---|---|
| Fuel type | gas |
| Bore/stroke character | 1.000 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,740 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 41.1 ci |
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