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

First Sight: Mercedes-AMG GT

“If I was to buy any sports car that wasn't a Mercedes, it'd be a Porsche 911,” says Mercedes' head of design, Gorden Wagener. “But when you see the two cars together, we think ours has the edge.” He's talking about the new Mercedes-AMG GT, a front-mid engined, two-seater sports car that's unashamedly aimed at higher-end 911s, and we've come to see it at Mercedes' Sindelfingen studio.  The GT replaces the larger SLS, and is seen by Wagener as the best example yet of his 'sensual purity' design philosophy: “The SLS is very much [he gestures] line, line with a surface in between. With the GT we started with the surface and worked to refine and reduce the number of lines.” Elements of the SLS's platform have been carried over, so the GT measures the same 1,939mm wide.

Red Bull & DC drive the Circuit of the Americas – off road.

DC takes the Red Bull F1 off road Surely, I hear you say, the Americans haven’t managed to finish off the Circuit of the Americas in Austin, Texas, already, have they? And you’d be quite right – they’re at groundworks stage. So how can DC pilot the Red Bull F1 car round a circuit of earth?

BMW 4 Series Coupe makes UK debut at PGA Championship

We had our first look at the car that will replace the old 3-Series Coupe ahead of its debut at the 2013 Detroit Auto Show when the BMW 4 Series Coupe Concept arrived, looking like a winner even before it goes in to production. Even when you take away some of the fripperies of a concept, you’re still left with an impressive 4 series Coupe that’s longer and lower than the old 3 Series – and a lot better looking. In fact, the 4 Series looks a lot like a smaller 6 Series and is also likely to spawn a ‘Gran Coupe’ version at some point – just like the 6 Series – which could do very interesting things to sales of the regular 3 series saloon.