Ford 428ci 10.5:1 Specs
Ford Ford 428ci · 4.132" × 3.984" · 10.5:1 engine specs: 428 ci (7L), 8-cylinder, 4.132" bore x 3.984" stroke, 10.5:1 compression.
Dimensions
| Displacement | 428 ci / 7 L |
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| Bore | 4.132" |
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| Stroke | 3.984" |
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| Cylinders | 8 |
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| Compression ratio | 10.5:1 |
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| Rod length | 6.488" |
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| Rod ratio | 1.629 |
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| Bore/stroke ratio | 1.037 |
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Construction
| Induction | 1-4 |
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| Advertised HP | 340–360 hp |
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| Years | 1968 |
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What these numbers mean
| Bore/stroke character | 1.037 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,984 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.629 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 53.5 ci |
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| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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Cylinder head
| Chamber volume | 68 cc |
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| Rocker ratio | 1.73:1 |
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| Lifter type | hydraulic |
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Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| 1968 | 340 hp | — |
| 1968 | 360 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
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