Pontiac GM Pontiac Tempest 420 389, Engine
| Engine capacity | 6,364 cm³ |
| Maximum power (range), hp | 215 - 315 |
| Maximum torque, N*m (kg*m) at rpm. | 529 (54) / 2000 |
| Fuel used | Petrol |
| Fuel consumption, l/100 km | 20.7 - 27 |
| Engine type | V-shaped, 8-cylinder |
| Additional engine information | carburetor Rochester 2GC 2-barrel |
| Maximum power, hp (kW) at rpm | 215 (158) / 3600 |
| Compression Ratio (Range) | 8.6 - 10.5 |
| Cylinder diameter (range), mm | 103.12 |
| Piston stroke (range), mm | 95.25 |
| Valve drive | OHV |
| Number of valves per cylinder (range) | 2 |