Pontiac Ponti 1975 140 87HP Specs
Pontiac Ponti 1975 140 87HP engine specs: 140 ci (2.3L), 4-cylinder, 3.501" bore x 3.625" stroke, 9.501:1 compression.
Dimensions
| Displacement | 140 ci / 2.3 L |
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| Bore | 3.501" |
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| Stroke | 3.625" |
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| Cylinders | 4 |
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| Configuration | I4 |
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| Compression ratio | 9.501:1 |
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| Rod length | 5.7" |
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| Rod ratio | 1.572 |
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| Bore/stroke ratio | 0.966 |
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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 | 87 hp |
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| Years | 1975 |
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What these numbers mean
| Bore/stroke character | 0.966 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,625 ft/min — in the range typical of performance street engines |
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| Rod ratio | 1.572 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 35.0 ci |
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| Static compression | 9.501:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.625" |
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| Exhaust valve diameter | 1.38" |
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