Bentley Bentley R6 4.9, Engine
| Engine capacity | 4,887 cm³ |
| Maximum power (range), hp | 150 - 185 |
| Maximum torque, N*m (kg*m) at rpm. | 370 (38) / 1500 |
| Fuel used | Petrol |
| Engine type | In-line, 6-cylinder |
| Additional engine information | 2 SU HD6 carburetors |
| Maximum power, hp (kW) at rpm | 178 (131) / 3600 |
| Compression Ratio (Range) | 6.6 - 8 |
| Cylinder diameter (range), mm | 95.25 |
| Piston stroke (range), mm | 114.3 |
| Valve drive | OHV |
| Number of valves per cylinder (range) | 2 |