See other engines in this family
Ford 6.2 Boss specs: 379 ci (6.2L) 8-cylinder, 4.016 x 3.74 in (102 x 95 mm) bore and stroke, 9.8:1 compression. SOHC. Rod ratio and piston speed worked out.
The Ford 6.2 Boss is oversquare — the 4.0157" bore exceeds the 3.7402" stroke by 7.4% — a layout that favors airflow and RPM over leverage at the crank. 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 8 cylinders displaces 47.4 ci (776 cc).
9.8:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 3 engines in the 6.2 Boss V8 family, all of them 379 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 379 ci / 6.2 L |
|---|---|
| Bore | 4.0157" |
| Stroke | 3.7402" |
| Cylinders | 8 |
| Compression ratio | 9.8:1 |
| Bore/stroke ratio | 1.074 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Bore/stroke character | 1.074 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,740 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 47.4 ci |
| Static compression | 9.8:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.