SUPERCAR

McLaren Senna GTR, new and wider fenders for the carbon fibre body

The development prototypes that begin testing this month will initially use modified Senna road car bodywork

The McLaren Senna GTR, a track-only hypercar that debuted in concept form at the Geneva International Motor Show in March 2018 and sold-out in the same month, begins dynamic testing this month with highlights of its technical specification newly confirmed – not least that it will generate 1000kg of downforce and have race-bred suspension developed from the system used in McLaren’s GT3 programme.

The Senna GTR is an even more extreme version of the road-legal McLaren Senna currently being built at the McLaren Production Centre in Woking, Surrey, UK. McLaren tested demand for the track-only, left-hand-drive only car on its introduction at Geneva, saying that up to 75 would be produced.

Many more expressions of interest were received, but the company has confirmed that only 75 will be available, all of which are already allocated. Deliveries are expected to begin from September 2019 when production of the road-legal McLaren Senna is complete.

The development prototypes that begin testing this month will initially use modified Senna road car bodywork. The final Senna GTR shape – shown in simple form in a new design sketch – will be based around a chassis with wider track front and rear and centre-lock wheels. The carbon fibre body has new, wider fenders, a larger front splitter and rear diffuser and repositioned active rear wing; these last two elements combining to improve aero-efficiency by ‘coupling’ the wing to the airflow from the diffuser, enabling greater – and more accessible – downforce at lower speeds. Optimised aerodynamic performance in yaw improves cornering stability, while reduction in pitch sensitivity leads to even greater braking stability.

The lightweight but incredibly strong carbon fibre McLaren Monocage at the heart of each McLaren Senna GTR epitomises McLaren’s approach to weight reduction, a philosophy which is taken even further with the new GTR. A pared-back interior sees all airbags removed, as well as the infotainment central screen and folding driver display found in the road car, while a new, race-style steering wheel with integrated gearshift controls replaces the road-legal component. Air-conditioning is an exception to the rule of absolute minimalism – remaining standard-fit – and a radar-assisted, rear collision avoidance system is also standard.

A final vehicle weight is still to be declared, but the GTR will weigh less than the road-going Senna. In combination with the 825PS output of the 4.0-litre twin-turbocharged V8 engine – an increase of 25PS over the road-legal Senna – this will see the power-to-weight ratio comfortably exceed that of the road car. Together with torque of up to 800Nm, the result will be astonishing levels of response and performance.

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