The McLaren Senna GTR will produce a tonne of downforce The McLaren Senna GTR will produce a tonne of downforce - ImagesGram

The McLaren Senna GTR will produce a tonne of downforce

McLaren is now busying itself turning the Senna GTR track-only special from a Geneva show ‘concept’ into a finished item. A fast one.

To mark the start of the car’s dynamic testing, Woking has confirmed big numbers for the Senna GTR. The headline is downforce: 1,000 kg (2,205 lb) of it, though the speed at which you have a tonne of aerodynamic grip available isn’t disclosed. Not that the Senna GTR will want for speed: its 4.0-litre bi-turbo V8 will develop 814 bhp (607 kW; 825 PS) – up from 789 bhp (588 kW; 800 PS) in the road-going Senna. Torque output remains 800 N⋅m (590 lb⋅ft).

Ridiculous downforce comes courtesy of the Senna GTR shunning road-legality, and employing active aero banned in the top echelons of motorsport. This sketch shows what to expect from the ‘production’ car – McLaren notes there’s a wider track, wider fenders, a ginormous front splitter (our word, not theirs) and a moveable rear wing ‘coupled’ to the rear diffuser.

We’ve also been given more clues about the Senna GTR’s light-weighting inside. No airbags, no infotainment touchscreen, no folding instrument binnacle – the only concession to comfort is air-conditioning. McLaren’s also included an interesting sounding ‘radar-assisted rear collision avoidance system’, which presumably boosts the car forward if its bonkers braking performance catches out an over-keen track-day goer behind. Or, perhaps it has missiles.

Though there’s no official weight for the Senna GTR yet, McLaren has promised it’ll be lighter than the 1,198 kg (2,641 lb) road-legal Senna. It’ll also cost £1.1m (around Rs 10.41 crore) plus taxes, but the 75 slated to be made are all sold, to brave individuals who desire a car with GT3-spec racing suspension, slick tyres and 3g capability. That’s 3g as in cornering G-force, not on-board internet.

So, this thing’s going to be very much the antithesis to the slippery, equally sold-out Speedtail, then. Got a favourite?