The hybrid powertrain in the new McLaren P1 hypercar will produce 903bhp and emit less than 200g/km of CO2, the company has revealed. Power will come from a mid-mounted twin-turbocharged 3.8-litre V8 producing 727bhp at 7500rpm and a 176bhp electric motor mounted directly onto the engine.
McLaren also confirmed the P1 engine’s torque figure of 531lb ft at 4000rpm and the electric motor’s instantly available 192lb ft. Peak combined torque of 664lb ft arrives at 4000rpm.
The electric motor’s 176bhp is also available instantly through a specially developed boost system called Instant Power Assist System (IPAS). It is operated by a steering wheel-mounted button and, McLaren says, gives the car the throttle response of a normally aspirated engine.
The engine, which is a revised version of the M838T unit from the MP4-12C, and electric motor drive the rear wheels through a seven-speed dual-clutch automatic gearbox. The P1 will be able to cover up to six miles on electric power alone, drawing on a 96kg battery pack described as having a greater energy density than that of any other car’s.