http://www.autocar.co.uk/News/NewsArticle/AllCars/255101/
Volkswagen is set to steal this week’s Qatar motor show with its latest ‘one-litre car’, the XL1 — a diesel hybrid concept that can deliver well in excess of 300mpg.
The new car is the third concept built to the vision of travelling 100km (62 miles) on a single litre of fuel. The first two vehicles, introduced in 2002 and 2009, used tandem seating, but the XL1 achieves the goal (or at 0.9l/100km, surpasses it) while looking remarkably conventional.