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Ford OHV Six specs: 215 ci 6-cylinder, 3.56 x 3.60 in (90.4 x 91.4 mm) bore and stroke. Rated 101 hp, 1952. Rod ratio and piston speed worked out.
The Ford OHV Six is close to square: 3.56" bore against 3.6" stroke, within 1.1%, which splits the difference between a high-revving layout and a torque layout. The 3.6" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 35.8 ci (587 cc).
It is one of 4 engines in the Ford 215ci family, all of them 215 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 215 ci |
|---|---|
| Bore | 3.56" |
| Stroke | 3.6" |
| Cylinders | 6 |
| Configuration | I6 |
| Bore/stroke ratio | 0.989 |
| Fuel type | gas |
|---|---|
| Advertised HP | 101 hp |
| Years | 1952 |
| Bore/stroke character | 0.989 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,600 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.8 ci |
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