Not just a concept, the Volkswagen XL1 is an actual diesel-powered vehicle that claims to achieve 313mpg. Weighing just 295kg, it's "powered by an 800cc TDI two-cylinder diesel engine linked to an electric motor." Video after the break. Click here for more pictures.
Due to go on sale in 2013, the car is just under four metres long - the same size as a Volkswagen Polo - and sits lower off the ground than a Lamborghini sports car at 1.18m tall.[via DailyMail]
