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Studebaker 224ci (1955) specs: 224 ci 8-cylinder, 3.563 x 2.813 in (90.5 x 71.4 mm) bore and stroke, 7.5:1 compression. Rated 140 hp, 1955.
The Studebaker 224ci (1955) is oversquare — the 3.5625" bore exceeds the 2.8125" stroke by 26.7% — a layout that favors airflow and RPM over leverage at the crank. The 2.8125" stroke does not reach 4,000 ft/min of mean piston speed until about 8,550 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 28.0 ci (459 cc).
7.5:1 is low by modern standards and generally happy on regular pump fuel.
| Displacement | 224 ci |
|---|---|
| Bore | 3.5625" * |
| Stroke | 2.8125" * |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 7.5:1 * |
| Bore/stroke ratio | 1.267 |
* Bore, stroke and compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 140 hp |
| Years | 1955 |
| Bore/stroke character | 1.267 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,813 ft/min — conservative for a street engine |
| Displacement per cylinder | 28.0 ci |
| Static compression | 7.5:1 — low by modern standards, generally happy on regular pump fuel |
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1 factory vehicle, 1955. Each year opens that model's engine table.