Oldsmobile LF7 Specs
Oldsmobile LF7 engine specs: 260 ci (4.3L), 8-cylinder, 3.7" bore x 3.07" stroke, 22.5:1 compression.
Dimensions
| Displacement | 260 ci / 4.3 L |
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| Bore | 3.7" |
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| Stroke | 3.07" |
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| Cylinders | 8 |
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| Compression ratio | 22.5:1 |
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| Bore/stroke ratio | 1.205 |
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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 | diesel |
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| Advertised HP | 85 hp |
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What these numbers mean
| Bore/stroke character | 1.205 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,070 ft/min — conservative for a street engine |
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| Displacement per cylinder | 32.5 ci |
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| Static compression | 22.5:1 — high enough that pump premium or better is normally required |
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Vehicles (2)
- Oldsmobile Cutlass
- Oldsmobile Omega
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