GMC 300 Specs
GMC 300 engine specs: 300 ci (4.9L), 8-cylinder, 3.811" bore x 3.25" stroke, 9:1 compression.
Dimensions
| Displacement | 300 ci / 4.9 L |
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| Bore | 3.811" |
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| Stroke | 3.25" |
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| Cylinders | 8 |
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| Compression ratio | 9:1 |
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| Bore/stroke ratio | 1.173 |
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Construction
| Block material | cast iron |
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| Head material | aluminum |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 210 hp |
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What these numbers mean
| Bore/stroke character | 1.173 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,250 ft/min — conservative for a street engine |
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| Displacement per cylinder | 37.5 ci |
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| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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Vehicles (3)
- Buick Skylark
- Buick Special
- Buick LeSabre
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