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Ford 2004 237 193HP specs: 237 ci (3.9L) 6-cylinder, 3.81 x 3.46 in (96.8 x 87.9 mm) bore and stroke. Rated 193 hp, 2004. Used in the Ford Mustang.
The Ford 2004 237 193HP is oversquare — the 3.81" bore exceeds the 3.46" stroke by 10.1% — a layout that favors airflow and RPM over leverage at the crank. The 3.46" stroke puts mean piston speed at 4,000 ft/min around 6,950 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 39.5 ci (647 cc).
| Displacement | 237 ci / 3.9 L |
|---|---|
| Bore | 3.81" |
| Stroke | 3.46" |
| Cylinders | 6 |
| Configuration | V6 |
| Bore/stroke ratio | 1.101 |
| Advertised HP | 193 hp |
|---|---|
| Years | 2004 |
| Bore/stroke character | 1.101 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,460 ft/min — conservative for a street engine |
| Displacement per cylinder | 39.5 ci |
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