GMC 265 Specs
GMC 265 engine specs: 265 ci (4.3L), 8-cylinder, 3.75" bore x 3" stroke, 8:1 compression.
Dimensions
| Displacement | 265 ci / 4.3 L |
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| Bore | 3.75" |
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| Stroke | 3" |
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| Cylinders | 8 |
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| Compression ratio | 8:1 |
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| Bore/stroke ratio | 1.25 |
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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 | 162 hp |
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What these numbers mean
| Bore/stroke character | 1.250 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,000 ft/min — conservative for a street engine |
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| Displacement per cylinder | 33.1 ci |
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| Static compression | 8:1 — low by modern standards, generally happy on regular pump fuel |
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Vehicles (2)
- GMC 100 Series
- GMC Suburban
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