Chevrolet 427ci 14.9:1 Specs
Chevrolet Chevrolet 427ci · 4.125" × 4.000" · 14.9:1 engine specs: 427 ci (7L), 8-cylinder, 4.125" bore x 4" stroke, 14.9:1 compression.
Dimensions
| Displacement | 427 ci / 7 L |
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| Bore | 4.125" |
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| Stroke | 4" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 14.9:1 |
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| Rod length | 6.1" |
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| Rod ratio | 1.525 |
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| Bore/stroke ratio | 1.031 |
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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 | 450 hp |
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| Years | 2014–2015 |
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What these numbers mean
| Bore/stroke character | 1.031 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 4,000 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.525 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
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| Displacement per cylinder | 53.4 ci |
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| Static compression | 14.9:1 — high enough that pump premium or better is normally required |
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Cylinder head
| Intake valve diameter | 2.28" |
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| Exhaust valve diameter | 1.62" |
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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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| 2014 | 450 hp | — |
| 2015 | 450 hp | — |
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