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

Video: The Making of the Mercedes-Benz AMG Vision Gran Turismo

In a new video exploring the design of the AMG Vision Gran Turismo, Mercedes-Benz designers speak of their excitement at designing without restrictions. The video, which features figures such as design vice-president Gorden Wagener, traces the car's development from the sketch phase to the final model – unveiled at last month's Los Angeles auto show. Steffen Köhl, director advanced design global, says, "We had the mix between the very far away showcar design – free and pure emotion – and a car that reacts realistically in the game." "The most stunning aspect of this car is the proportion.

BMW M3 DTM Concept Car (2011) first official pictures

Andy Priaulx's guide to 2012's BMW M3 DTM racer This is BMW’s M3 DTM Concept Car, a taster of the near-500bhp racer that will compete in the 2012 DTM (German Touring Car) series. Unveiled at BMW Welt in Munich, it signals BMW's return to the DTM after a two-decade absence; between 1987 and 1992, the BMW M3 won 40 races and had over 150 podium finishes in Germany's premier tin-top series. Does this new BMW M3 DTM car bear any resemblance to a road-going M3?

One Lap of the Web: Motel kitsch, Bentley dragsters and rusting Porsches

-- The roach motel lives on in these postcards from Petrolicious. The Googie signs and modernist architecture jump from the Howard Johnsons and Travelodges of the 1950s, when buildings were built in color. For a precious few decades in the tapestry of American interstate travel, before they became the refuge of schlocky horror movies, the motor hotel was the true King of the Road.