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Is the McLaren P1 order book about to close?

We’re hearing that McLaren is ready to close the order book for their P1 supercar before the specification – or the car – have been fully revealed. We’ve had the reveal of the P1 Concept – and seen it floating round the world as McLaren drum up potential customers with enormous bottomless pockets – and we’ve even seen the P1 on the move as McLaren shake down the development version of the P1. But so far we haven’t had the full specs of the P1 revealed and, as far as we can tell, McLaren hasn’t even divulged the full details of the P1′s power and performance to potential customers – no matter how wealthy they are.

New Bugatti 'could be too fast to test'

THE UPCOMING replacement for the world's fastest luxury car could be too quick to test, according to a motoring magazine. Bugatti is looking to replace the famous Veyron with a new, faster model that could reach speeds of around 286mph, but questions have been raised by weekly title Autocar over whether the facilities will exist to test it to its maximum. Not only is space a concern for the 1,500-horsepower concept, because it will need much longer straights than the Veyron, but also tyres are an issue.

White House pushes for Friday deal on fuel-economy regulations

The White House wants to announce as early as Friday that it has reached agreement with most automakers on a plan to raise corporate average fuel economy targets to 54.5 mpg by 2025, manufacturers' representatives said Wednesday. While no automakers have signed on to the Obama administration plan yet, most--including Ford, Toyota, General Motors and Chrysler--are generally supportive and intend to do so, the industry officials said. Each manufacturer is trying to iron out technical issues with the White House before endorsing the proposal.