The new McLaren
P1 will have two power units that will work together to produce 916PS of power. By combining the output of the 3.8-litre petrol V8 and a lightweight electric motor, the design team say the new model will have “superb throttle response, day-to-day drivability” and, of course, a headline grabbing top speed.
As you would expect with a hybrid system of this type, the P1 will even be able to drive in full electric mode with zero tailpipe emissions. However, few drivers are likely to drive in this manner, except in traffic and the normal emissions figure will be closer to 200g/km on the combined cycle – still pretty good for a supercar.
The 3.8-litre twin-turbo V8 petrol engine in the McLaren P1™ is a new version of the familiar M838T unit, that has been significantly upgraded to optimise cooling and durability under the higher loads. The engine block has a unique casting to incorporate the electric motor. The petrol engine produces 737PS (727 bhp) at 7,500rpm, and 720Nm of torque from 4,000rpm.
The lightweight electric motor on the P1 has been developed by the McLaren Electronics arm of the Group. It produces 179PS (176 bhp), and is unique to the McLaren P1. The motor produces maximum torque of 260Nm instantly from a standstill, greatly increasing the throttle response of the McLaren P1, and peak combined torque of 900Nm is delivered from just 4,000 rpm.
The Formula 1-derived DRS and IPAS technologies will bring the P1 an increase in straight-line speed and an instant boost of power. The IPAS is a McLaren-developed ‘boost’ system, that provides up to 179PS instantly. McLaren say the “instant response of the electric motor provides a sharper throttle response more associated with a normally aspirated engine, and the significantly enhanced air-charging system enables the McLaren P1™ to have more top-end power – the perfect combination for high performance”.
The electric motor is mounted directly onto the engine, and all drive is channelled through the dual-clutch seven-speed gearbox to drive the rear wheels. A further claimed benefit is that the e-motor can provide faster upshifts, through the application of instant negative torque at the point of shift, making the engine revs drop as quickly and efficiently as possible to the required engine speed for the upshift.