McLaren 720 S with M840T engine
The McLaren 720S (McLaren 750S since 2023) is a sports car designed and manufactured by British automobile manufacturer McLaren Automotive. It is the second all-new car in the McLaren Super Series, replacing the 650S beginning in May 2017.
The McLaren M840T engine is a 4.0 L (244.1 cu in), 90-degree, twin-turbocharged, flat-plane V8 petrol engine, designed and developed and produced by McLaren, in partnership and collaboration with Ricardo, and introduced with their 720S sports car model, in 2017. It is an evolution of the M838T engine, introduced in 2011.
McLaren’s new M840T engine debuted as an evolution of the M838T used in the 650S. It is a 3,994 cc (4.0 L; 243.7 cu in) twin-turbocharged V8 engine. However, the stroke has been lengthened by 3.6 mm to increase the capacity and 41% of the engine’s components are new.
The engine uses new twin-scroll turbochargers which have a low inertia titanium-aluminium turbines which spin with maximum efficiency with the help of actively controlled waste gates. The engine in the 720S was rated at a power output of 720 PS (530 kW; 710 hp) at 7,500 rpm, giving the car its name; the maximum torque is 568 lb⋅ft (770 N⋅m) at 5,500 rpm.