Bore, stroke, displacement and compression for all 3 Oldsmobile Oldsmobile 138ci engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Oldsmobile 138ci · 3.625" × 3.350" · 11:1 | 138 ci | 3.625" × 3.35" | 11:1 | 115–180 |
| Oldsmobile 138ci · 3.625" × 3.350" · 11.9:1 | 138 ci | 3.625" × 3.35" | 11.9:1 | 180 |
| Oldsmobile 138ci · 3.625" × 3.350" · 9.5:1 | 138 ci | 3.625" × 3.35" | 9.5:1 | 155–175 |