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Studebaker 289ci (1956–1964) specs: 289 ci 8-cylinder, 3.563 x 3.625 in (90.5 x 92.1 mm) bore and stroke. Rated 210-289 hp, 1956–1964.
The Studebaker 289ci (1956–1964) is close to square: 3.5625" bore against 3.625" stroke, within 1.7%, which splits the difference between a high-revving layout and a torque layout. The 3.625" stroke puts mean piston speed at 4,000 ft/min around 6,600 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 36.1 ci (592 cc).
19 factory variants share these dimensions, rated from 210 to 289 hp across 1956–1964.
| Displacement | 289 ci |
|---|---|
| Bore | 3.5625" |
| Stroke | 3.625" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 7.5–10.25:1 (published figures vary) |
| Bore/stroke ratio | 0.983 |
| Fuel type | gas |
|---|---|
| Advertised HP | 210–289 hp |
| Years | 1956–1964 |
| Bore/stroke character | 0.983 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,625 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.1 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1956 | 210 hp | — |
| 1957 | 210 hp | — |
| 1957 | 225 hp | — |
| 1957 | 275 hp | — |
| 1958 | 210 hp | — |
| 1958 | 275 hp | — |
| 1960 | 210 hp | — |
| 1960 | 225 hp | — |
| 1961 | — | — |
| 1961 | 210 hp | — |
| 1961 | 225 hp | — |
| 1962 | 210 hp | — |
| 1962 | 225 hp | — |
| 1963 | — | — |
| 1963 | 240 hp | — |
| 1963 | 289 hp | — |
| 1964 | — | — |
| 1964 | 240 hp | — |
| 1964 | 289 hp | — |
4 factory vehicles, 1956–1964. Each year opens that model's engine table.