Bore, stroke, displacement and compression for all 4 Pontiac Pontiac 389ci engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Pontiac 389ci · 4.062" × 3.75" · 8.6:1 | 389 ci | 4.062" × 3.75" | 8.6:1 | 215–256 |
| Pontiac 389ci · 4.062" × 3.75" · 10.25:1 | 389 ci | 4.062" × 3.75" | 10.25:1 | 267–313 |
| Pontiac 389ci · 4.062" × 3.75" · 10.75:1 | 389 ci | 4.062" × 3.75" | 10.75:1 | 318–360 |
| Pontiac 389ci · 4.062" × 3.75" · 10.5:1 | 389 ci | 4.062" × 3.75" | 10.5:1 | 267–333 |