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At the heart of W1 is an all-new High-Performance Hybrid powertrain, comprising McLaren's all-new MHP-8 V8 combustion engine, an all-new E-module (integrating a radial flux electric motor and motor control unit), and an 8-speed transmission with E-reverse. Power and torque are to the rear wheels only, through an E-differential.

The 928PS of the new V8 and 347PS of the E-module combine to produce 1275PS, giving W1 the highest-ever power output of any McLaren and putting it above all core competitors. Engineered for epic power delivery and breathtaking performance, the powertrain combines with a vehicle weight of 1,399kg to deliver an astonishing power-to-weight ratio of 911PS/tonne for W1 - the highest-ever for any road-legal McLaren and more importantly, best-in-class.

This huge amount of power, together with total torque of 1340Nm and instant throttle response from the E-module, gives W1 astonishing acceleration figures: 0-100km/h takes 2.7 seconds, 0-200km/h (124mph) is possible in just 5.8 seconds and 0-300km/h (186mph) can be achieved in under 12.7 seconds.