Bore, stroke, displacement and compression for all 5 Jeep AMC Straight-6 engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 258 | 258 ci | 3.75" × 4" | 9.2:1 | 112 |
| 258 | 258 ci | 3.75" × 3.9" | 9.2:1 | 112 |
| 242 | 242 ci | 3.874" × 3.4134" | 8.8:1 | 190 |
| 4.0L HO | 242 ci | 3.8752" × 3.4098" | 8.8:1 | 190 |
| AMC Straight-6 · 3.875" × 3.410" · 9.2:1 | 242 ci | 3.8752" × 3.4098" | 9.2:1 | 177–190 |