Oldsmobile Oldsm 1982 252 125HP Specs
Oldsmobile Oldsm 1982 252 125HP engine specs: 252 ci (4.1L), 6-cylinder, 3.965" bore x 3.4" stroke, 9.391:1 compression.
Dimensions
| Displacement | 252 ci / 4.1 L |
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| Bore | 3.965" |
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| Stroke | 3.4" |
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| Cylinders | 6 |
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| Configuration | V6 |
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| Compression ratio | 9.391:1 |
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| Rod length | 5.96" |
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| Rod ratio | 1.753 |
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| Bore/stroke ratio | 1.166 |
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| Piston deck clearance | 0.01" |
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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 | 125 hp |
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| Years | 1982 |
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What these numbers mean
| Bore/stroke character | 1.166 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,400 ft/min — conservative for a street engine |
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| Rod ratio | 1.753 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 42.0 ci |
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| Static compression | 9.391:1 — low by modern standards, generally happy on regular pump fuel |
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Cylinder head
| Intake valve diameter | 1.715" |
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| Exhaust valve diameter | 1.505" |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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