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Ford 223 Six specs: 223 ci (3.7L) 6-cylinder, 3.625 x 3.60 in (92.1 x 91.4 mm) bore and stroke. Rated 135-139 hp, 1960–1964. Used in the Ford F-100. OHV.
The Ford 223 Six is close to square: 3.625" bore against 3.6" stroke, within 0.7%, 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 37.2 ci (609 cc).
It is one of 11 engines in the Ford 223ci family, all of them 223 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions, rated from 135 to 139 hp across 1960–1964.
| Displacement | 223 ci / 3.7 L |
|---|---|
| Bore | 3.625" |
| Stroke | 3.6" |
| Cylinders | 6 |
| Configuration | I6 |
| Bore/stroke ratio | 1.007 |
| Block material | cast iron |
|---|---|
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 135–139 hp |
| Years | 1960–1964 |
| Bore/stroke character | 1.007 — 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 | 37.2 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1960 | 139 hp | 223 Six |
| 1962 | 135 hp | 223 Six |
| 1963 | 135 hp | 223 Six |
| 1964 | 135 hp | 223 Six |