Chevrolet 85ci 9.28:1 Specs
Chevrolet Chevrolet 85ci · 3.228" × 2.606" · 9.28:1 engine specs: 85 ci (1.4L), 4-cylinder, 3.228" bore x 2.606" stroke, 9.28:1 compression.
Dimensions
| Displacement | 85 ci / 1.4 L |
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| Bore | 3.228" |
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| Stroke | 2.606" |
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| Cylinders | 4 |
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| Compression ratio | 9.28:1 |
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| Rod length | 4.8" |
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| Rod ratio | 1.842 |
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| Bore/stroke ratio | 1.239 |
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Construction
| Induction | 1-1 |
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| Advertised HP | 52 hp |
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| Years | 1976 |
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What these numbers mean
| Bore/stroke character | 1.239 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 2,606 ft/min — conservative for a street engine |
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| Rod ratio | 1.842 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 21.3 ci |
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| Static compression | 9.28:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Chamber volume | 39 cc |
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| Rocker ratio | 1.6:1 |
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| Lifter type | hydraulic |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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