Bore, stroke, displacement and compression for all 9 GMC Pontiac V8 engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 455 | 455 ci | 4.0598" × 4.3799" | 8.2:1 | 370 |
| 428 | 428 ci | 4.1882" × 3.8" | 10.75:1 | 390 |
| 421 | 421 ci | 4.1882" × 3.7" | 10.75:1 | 370 |
| 400 | 400 ci | 4" × 4" | 10.75:1 | 360 |
| 389 | 389 ci | 4.0598" × 3.9402" | 10.5:1 | 348 |
| 370 | 370 ci | 4.0598" × 3.6" | 10.5:1 | 300 |
| 347 | 347 ci | 4" × 3.5" | 10:1 | 270 |
| 316 | 316 ci | 3.8748" × 3.2799" | 8.9:1 | 205 |
| 287 | 287 ci | 3.75" × 3.2799" | 8:1 | 180 |