Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Koenigsegg's craziest supercar yet debuts at Geneva

Here's what you need to know about the Koenigsegg One:1. It weighs 1,360 kilograms; it produces 1,360 hp. One horsepower per kilogram, which is why mad scientist Christian Von Koenigsegg is absolutely justified in bragging about it: it's the world's first "mega car," he said.

New car registrations at five-year high September 2013

New car registrations at five-year high September 2013 Despite the UK economy being in the doldrums for much of the past five years, new car registrations have recovered well ahead of the curve and still seem to be unstoppable. September saw new car registrations hit 403,136 – the highest figure for five and a half years – and the first time since 2008 new car registrations have broken the 400k barrier. We’ve covered the reasons before – pre-reg cars, dealer discounts and even PPI payouts – but car registrations are certainly continuing to give buoyancy to a recovery that’s still fragile.

Porsche race cars gather at Quail Lodge: Video

In contrast to the Rennsport Reunion's raucous goings on at Mazda Raceway Laguna Seca, the Race Car Classic at the Quail Lodge took a more serene approach in presenting the first few decades of Porsche racing. It was almost too serene, as the field of roughly 200 cars draped in loose silk car covers that greeted the crowd gave the impression of burying Porsches, not praising them. But things perked up with a group unveiling that revealed an outstanding collection of rare and unique racers, including many from the Porsche Museum and the Collier collection.