McLaren has already confirmed that the 675LT will be so called because of its Long Tail shape, to improve aerodynamics and handling; plus the fact that the 3.8-liter V8 engine powering it will deliver 675PS or 666bhp. That means that only the company's flagship hypercar, the hybrid P1, is more potent. And every example of that particular car has already been accounted for. All 375 have been pre-sold and McLaren will not be building any more.