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International V-400 specs: 401 ci 8-cylinder, 4.165 x 3.68 in (105.8 x 93.5 mm) bore and stroke. Built 1974. Used in the International Pickup.
The International V-400 is oversquare — the 4.165" bore exceeds the 3.68" stroke by 13.2% — a layout that favors airflow and RPM over leverage at the crank. The 3.68" stroke puts mean piston speed at 4,000 ft/min around 6,500 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 50.1 ci (821 cc).
| Displacement | 401 ci |
|---|---|
| Bore | 4.165" |
| Stroke | 3.68" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 8.25–8.5:1 (published figures vary) |
| Bore/stroke ratio | 1.132 |
| Fuel type | gas |
|---|---|
| Years | 1974 |
| Bore/stroke character | 1.132 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,680 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 50.1 ci |
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2 factory vehicles, 1974. Each year opens that model's engine table.