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Nash 327ci (1957) specs: 327 ci 8-cylinder, 4.00 x 3.25 in (101.6 x 82.6 mm) bore and stroke, 9:1 compression. Rated 255 hp, 1957. Used in the Nash Nash.
The Nash 327ci (1957) is oversquare — the 4" bore exceeds the 3.25" stroke by 23.1% — a layout that favors airflow and RPM over leverage at the crank. The 3.25" stroke does not reach 4,000 ft/min of mean piston speed until about 7,400 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 40.9 ci (670 cc).
9:1 is low by modern standards and generally happy on regular pump fuel.
| Displacement | 327 ci |
|---|---|
| Bore | 4" |
| Stroke | 3.25" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 1.231 |
| Fuel type | gas |
|---|---|
| Advertised HP | 255 hp |
| Years | 1957 |
| Bore/stroke character | 1.231 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,250 ft/min — conservative for a street engine |
| Displacement per cylinder | 40.9 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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1 factory vehicle, 1957. Each year opens that model's engine table.