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

Concept Car of the Week: Citroën C-Airdream

In the 1990s and early 2000s one of the most charismatic, brave and forward-thinking car makers, Citroën, had been reduced to the maker of budget, mainstream Euro boxes such as the Saxo and Xsara. The company hinted at its intentions to break free from its mundane existence as the maker of line-of-least-resistance rental cars with its Lignage concept in 1999 that harked back to its past large sedans, especially the CX. But it was at the 2002 Paris motor show that Citroën put a stake in the ground with its fabulously avantgarde Citroën C-Airdream concept.

Official 2014 BMW 4-series convertible photo gallery

Feast your eyes on the new 2014 BMW 4-series convertible: The newest drop-top BMW looks, well, a lot like you'd expect a hardtop convertible version of the company's new 4-series coupe to look. Mimicking the rest of the 4-series lineup, the 2014 4-series convertible will be offered in I-4 428i and straight-six 435i versions, each with a standard 8-speed automatic. Only the 428i will be available with BMW's xDrive AWD system at launch, however -- RWD is standard on both trim levels.

Lamborghini Veneno: Official

The Lamborghini Veneno, a limited run Aventador LP700-4, has been officially revealed by Lamborghini with dramatic styling and 740bhp. Lamborghini tell us that all three Venenos have already been sold – at a hefty £3.12 million, no less – and the Veneno is more a street-legal track car than just a titivated Aventador. The body of the Veneno – which is named after a particularly ’Venomous’ fighting bull – is crafted from carbon fibre and is designed to achieve optimal aerodynamics with the front splitter, rear diffuser, huge rear wing and a big fin running down the middle of the roof all conspiring to make the Veneno more aerodynamic than its Aventador sibling.