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Ford 4.6L 2V SOHC PI specs: 281 ci (4.6L) 8-cylinder, 3.551 x 3.543 in (90.2 x 90 mm) bore and stroke, 9.4:1 compression. Rated 215 hp. SOHC.
The Ford 4.6L 2V SOHC PI is close to square: 3.5512" bore against 3.5433" stroke, within 0.2%, which splits the difference between a high-revving layout and a torque layout. The 3.5433" stroke puts mean piston speed at 4,000 ft/min around 6,750 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 35.1 ci (576 cc).
9.4:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 16 engines in the Modular family, the smallest at 281 ci. Factory fitments include the Ford Crown Victoria, Mercury Grand Marquis, Lincoln Town Car and 4 others.
| Displacement | 281 ci / 4.6 L |
|---|---|
| Bore | 3.5512" |
| Stroke | 3.5433" |
| Cylinders | 8 |
| Compression ratio | 9.4:1 |
| Bore/stroke ratio | 1.002 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 215 hp |
| Bore/stroke character | 1.002 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,543 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.1 ci |
| Static compression | 9.4:1 — low by modern standards, generally happy on regular pump fuel |
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