Buick Buick 455ci · 4.313" × 3.9" · 10.28:1 engine specs: 455 ci (7.5L), 8-cylinder, 4.313" bore x 3.9" stroke, 10.28:1 compression.
| Displacement | 455 ci / 7.5 L |
|---|---|
| Bore | 4.313" |
| Stroke | 3.9" |
| Cylinders | 8 |
| Compression ratio | 10.28:1 |
| Rod length | 6.607" |
| Rod ratio | 1.694 |
| Bore/stroke ratio | 1.106 |
| Advertised HP | 205 hp |
|---|---|
| Years | 1976 |
| Bore/stroke character | 1.106 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,900 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.694 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 56.9 ci |
| Static compression | 10.28:1 — in the range that usually runs on pump premium |
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Source: NHRA blueprints — nhra.net blueprints