McLaren M840T, Engine
| Engine capacity | 3,994 cm³ |
| Maximum power (range), hp | 710 - 750 |
| Maximum torque, N*m (kg*m) at rpm. | 770 (79) / 5500 |
| Fuel used | Gasoline AI-98 |
| Fuel consumption, l/100 km | 12.2 |
| Engine type | V-shaped, 8-cylinder |
| Maximum power, hp (kW) at rpm | 710 (522) / 7500 |
| Cylinder diameter (range), mm | 93 |
| Piston stroke (range), mm | 73.5 |
| Supercharger | Twin turbocharging |
| CO₂ emissions (range), g/km | 276 |
| Valve drive | DOHC |
| Start-stop system |