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.

Vauxhall & Opel could merge with Peugeot Citroen.

GM Europe (Opel and Vauxhall) could extend their deal with PSA (Peugeot Citroen) with a Joint Venture or merger. When GM Europe and PSA announced they were forming an alliance earlier this year, we asked if this was an admission that the mainstream car market in Europe had changed forever, and an alliance between Opel, Vauxhall, Peugeot and Citroen was the only way to keep the brands viable. But we did also question what use a projected annual saving of €2 billion by sharing suppliers and co-developing platforms would be to PSA and GM considering their woeful losses.

Mercedes McLaren SLR Stirling Moss Image Gallery

Mercedes McLaren SLR Sterling Moss Photo Image Gallery [ad#ad-1] The McLaren SLR has been with us a few years now, and has had a few models – roadster and coupe versions of the standard SLR and the 722 – but this is the final model, and what a farewell! Based on the underpinnings of the SLR 722 Roadster, the Stirling Moss is completely rebodied to pay homage to the 1950s SLRs Stirling Moss raced in events like the Mille Miglia.