McLaren will show the finalized P1 GTR in Geneva Motor Show and just released the final details about one of the most expensive track-toys ever built.

The vital numbers are: 1000PS of combined output, with 800 (789bhp) of them coming by the 3.8-litre twin-turbo petrol engine and the other 200 (197bhp) available immediately from the electric motor. The front track is wider by 80mm than the road-going version and the ride is lowered by 50mm as well. Mclaren was able to reduce the weight by 50kg, applying a series of pure motorsport solutions.

Side windows are now made from motorsport-specification polycarbonate with a sliding ‘ticket window’ on the driver’s side. The glass panels on the roof have been replaced by carbon-fibre ones “to give the cabin a more enclosed, cocooned environment” with the same happening in the engine bay cover as well.

The Mclaren P1 GT-R is wearing a set of 19-inched centre-locking motorsport alloy wheels, shod in Pirelli slick tyres. In the front we find a more aggressive front splitter and the sides are dominated by a “sleek, aerodynamic blade which cleans the flow of air along the car’s flanks”.

The fixed rear wing seats more than 400mm above the bodywork, 100 more than the road-going version. In conjunction with the front flaps ahead of the front wheels, the P1 GT-R generates up to 660kg of downforce at 150mph, an increase of more than 10 percent. The huge wing retains the DRS (Drag Reduction Sustem) function of the road car and it can trim the pitch from 32° to 0° at the push of the button on the steering wheel. The huge, twin exhaust pipes are made from an Inconel and titanium alloy, saving more than 6.5kg over the standard item.

The Geneva Show car will be painted in the same livery of the F1 GTR chassis #06R and will make its debut next to the 675LT.

This or a LaFerrari FXX K?

PHOTO GALLERY