The Powertrain of the Bentley Bentayga are as follow:
| Variants | 2019 Bentley Bentayga Speed | 2018 Bentley Bentayga Bentayga | 2019 Bentley Bentayga V8 Design Series | 2019 Bentley Bentayga V8 | 2019 Bentley Bentayga Diesel | 2019 Bentley Bentayga Hybrid |
| Capacity (L) | 6.0L | 6.0L | 4.0L | 4.0L | 4.0L | 4.0L |
| Aspiration Form | Turbocharged | Turbocharged | Turbocharged | Turbocharged | Turbocharged | Turbocharged |
| Cylinder Arrangement | Inline | Inline | Inline | Inline | Inline | Inline |
| Number of Cylinders | 8 | 8 | 8 | 8 | 8 | 8 |
| Compression Ratio | ||||||
| Valvetrain | ||||||
| Timing Type | ||||||
| Horsepower (PS) | 635 | 608 | 550 | 550 | 550 | 550 |
| Rpm at Max Hp | 6000 | 6000 | 6000 | 6000 | 6000 | 6000 |
| Torque(Nm) | 900 | 900 | 770 | 770 | 770 | 770 |
| Rpm at Max torque | 4500 | 4500 | 4500 | 4500 | 4500 | 4500 |
| Top Speed (km/h) | 290 | 290 | 290 | 290 | 290 | 290 |
| Fuel | Petrol | Petrol | Petrol | Petrol | Petrol | Hybrid |
