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

Porsche 911 cabriolet: First official photographs

Porsche has developed an innovative fabric and composite-plastic folding roof for the 911 cabriolet as part of a push to give it a cleaner appearance, improved aerodynamic efficiency and greater levels of refinement than its strong-selling predecessor. Pictured here officially for the first time ahead of its world premiere in January at the Detroit auto show, the new open-top 911 is planned to go on sale in North America in 2012 in Carrera cabriolet and Carrera S models. Eschewing the traditional multilayered fabric structure of the 997 series 911 cabriolet, the next model (991 series) adopts a specially developed lightweight roof that uses two fabric-skinned composite plastic panels for the upper and rear part of the structure, giving it a more uniform shape together with a tauter fit that is claimed to make it more resistant than before to buffeting at high speeds.

Audi lightly updates 2011 TT, adds power boost

Audi's nifty two-door TT gets a light update for 2011, with a bit more power under hood and some minor modifications inside and out. The spotlight change is to the engine. The 2.0-liter TFSI is bolstered to 211 hp and 258 lb-ft of torque thanks to Audi's valvelift system, which also improves efficiency.

Vuhl 05 is a Mexican Ariel Atom – costs from £66,000

The Vuhl 05 (pictured), track-focused road car, has been revealed The Vuhl 05 – which has been teased recently – was unveiled this afternoon in London as Mexico’s answer to the Ariel Atom. The Vuhl 05 uses a bonded monocoque with honeycomb panels and aluminium covered on plastic panels to keep weight down to just 695kg. That means that even though the Vuhl 05 has only 285bhp available from its mid-mounted 2.0 litre turbo Ford EcoBoost engine, it can still get to 62mph in 3.7 seconds thanks to a power to weight ratio of 400bhp per tonne.