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.

The quest for eights in a Nissan GT-R

Eight seconds can seem either like an instant or an eternity. For SP Engineering, however, eight seconds is the threshold it aims to cross in its highly modified Nissan GT-R shop car for the standing quarter-mile. “This car will run eights,” said Will Wong, wholesale manager at SP Engineering.

Mercedes AMG GT S hits the track in new HD video

The new Mercedes AMG GT S on track at Circuit of Americas The Mercedes AMG GT is the long-awaited replacement in the Mercedes range for the SLS AMG, but even though the new AMG GT (and GT S) offers performance almost the equivalent of the SLS, it’s price tag is a lot lower. In fact, at prices expected to start at around £100,000 – and an extra £10-15k for the GT S version – the new AMG GT is at least a third cheaper than the SLS, and aimed at cars like the Porsche 911 and Jaguar F-Type rather than the stratospheric supercars the SLS had in its sights. That also means Mercedes AMG are going to have to sell a chunk more GTs than they ever did SLS models, so you can expect more promos and more profile for the AMG GT than you’d ever have seen for the modest-run SLS – like the latest Mercedes has just released (below).