Ford 250ci 9.751:1 Specs
Ford Ford 250ci · 3.682" × 3.910" · 9.751:1 engine specs: 250 ci (4.1L), 6-cylinder, 3.682" bore x 3.91" stroke, 9.751:1 compression.
Dimensions
| Displacement | 250 ci / 4.1 L |
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| Bore | 3.682" |
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| Stroke | 3.91" |
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| Cylinders | 6 |
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| Configuration | I6 |
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| Compression ratio | 9.751:1 |
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| Rod length | 5.88" |
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| Rod ratio | 1.504 |
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| Bore/stroke ratio | 0.942 |
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Construction
| Block material | cast iron |
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| Head material | cast iron |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 81–91 hp |
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| Years | 1974–1976 |
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What these numbers mean
| Bore/stroke character | 0.942 — undersquare — stroke exceeds bore, which favours low-end torque |
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| Mean piston speed at 6,000 RPM | 3,910 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.504 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
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| Displacement per cylinder | 41.7 ci |
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| Static compression | 9.751:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.66" |
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| Exhaust valve diameter | 1.399" |
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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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| 1974 | 91 hp | — |
| 1976 | 81 hp | — |
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