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

At GM, the tail fin is back--but now it's a blade

Tail fins are making a comeback at General Motors Co., although they are a far cry from the saillike appendages of the 1950s. And this time the company is calling them blades. The look, pioneered on the Chevrolet Volt to improve aerodynamics, will appear on other models to boost fuel economy, said Ed Welburn, GM's global design chief.

Citroen C-Buggy

Citroen will show their latest concept in Spain at the Madrid Motor Show next week. Chopping the roof off last year's C-AirPlay brings the concept closer the Smart Crossblade seen in 2001, and proposes a potential direction for a more leisure-orientated supermini. Just as open-cars are philosophically opposed to closed ones, Citroen has carried this equation through to the trim as well: the gray exterior of the C-Buggy contrasts with the white of the C-AirPlay, while the green interior inverts its forbear?s rouge.

Koenigsegg Hundra: One-off Koenigsegg Agera S – first details & pictures

The 100th Koenigsegg – the Koenigsegg Hundra, based on the Agera S – is heading for a debut at the 2013 Geneva Motor Show. The Koenigsegg Hundra (hundra means 100th in Swedish) is a right hand drive Agera S in clear carbon with 24 carat gold leaf inlays – Artisan applied, of course – creating what Koenigsegg are calling “…an intriguing mix of traditional and hi-tech craftsmanship”. We’re assuming that the Koenigsegg Hundra is heading for Hong Kong because Koenigsegg has based it on the Agera S – which can produce the 1030 horses of the Agera R but without needing to use biofuel – and it’s right hand drive.