Ford 427ci 10.9:1 Specs
Ford Ford 427ci · 4.232" × 3.784" · 10.9:1 engine specs: 427 ci (7L), 8-cylinder, 4.232" bore x 3.784" stroke, 10.9:1 compression.
Dimensions
| Displacement | 427 ci / 7 L |
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| Bore | 4.232" |
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| Stroke | 3.784" |
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| Cylinders | 8 |
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| Compression ratio | 10.9:1 |
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| Rod length | 6.488" |
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| Rod ratio | 1.715 |
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| Bore/stroke ratio | 1.118 |
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Construction
| Induction | 1-4 |
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| Advertised HP | 390 hp |
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| Years | 1968 |
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What these numbers mean
| Bore/stroke character | 1.118 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,784 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.715 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 53.4 ci |
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| Static compression | 10.9:1 — in the range that usually runs on pump premium |
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Cylinder head
| Chamber volume | 66 cc |
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| Rocker ratio | 1.76:1 |
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| Lifter type | hydraulic |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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