Lamborghini SC18 is wild McLaren P1 GTR rival

Lamborghini has released pictures over the weekend of a new one-off Lamborghini SC18 supercar it has created for a wealthy track-day fan.

Developed by Lamborghini Squadra Corse, the Italian car-maker's very own motorsport division, the unique one-of-one Lamborghini SC18 is even road legal -- despite its wild wings.

In fact, the outlandish SC18 is actually based on the car-maker's already unhinged V12-powered Aventador SVJ.

Developed for an existing wealthy owner, the Lamborghini SC18 blends an extreme aero package with know-how borrowed from the car-maker's participation in sports car racing.

This sees the large coupe get real race elements and air intakes inspired by the latest Huracan GT3 EVO.

The SC18's redesigned rear fenders, fins and air scoops are said, again, to be borrowed from another one of the charging bull's race cars, this time the Huracan Super Trofeo EVO racer.

The huge rear carbon-fibre wing, meanwhile, is unique to the SC18 and has three manual adjustments to favour downforce or top speed.

Under the rear boot lid (that now features 12 air intakes for extra cooling), the Lamborghini SC18 gets the same normally-aspirated 6.5-litre V12 as the Aventador SVJ but with fractionally more power, with the wick turned up to 574kW (+8KW).

Torque remains towering, peaking at 720Nm, and like the V12 coupe the SC18 get the same seven-speed single-clutch automated manual gearbox.

Lamborghini hasn't released any performance figures but it's safe to say the SC18's extra weight-saving and added aero will mean that, on track, it will easily humble the Aventador SVJ when it comes to lap times -- especially since Pirelli has developed special P Zero Corsa tyres that have been optimised for the one-off Lambo.

Inside, the wild exterior is reflected by a cabin dominated by black Alcantara seats with bright red highlights.

To help the owner improve his driving, Lamborghini has equipped the SC18's infotainment system with telemetry software to measure both the car and human's performance.

It's thought Lamborghini Squadra Corse's involvement with developing extreme version of the Italian supercar-maker's products will continue in the future with more bespoke customer commissions of all the car-maker's models, including the Urus SUV.

Lamborghini hasn't disclosed how much the SC18 cost its owner, nor whether or not he or she plans to actually use it on track.