the 'xl1' concept car by volkswagen first publicly presented at the qatar motor show 2011 , volkswagen 's 'xl1' concept car combines energy efficient technology and streamlined aesthetics to create a hybrid vehicle capable of attaining speeds of 99mph and returning 313 miles to the gallon, even as it emits only a quarter as much CO2 as the most efficient models on the market today. full view of the car the streamlined shape of the 'xl1' is designed to be highly aerodynamic. weighing 795kg, the vehicle makes use of volkswagen's custom 'resin transfer moulding' technique to create the lightweight carbon-reinforced polymer components that make up much of the body, and lightweight metals and other materials are likewise made use of throughout the car. to further decrease its drag, the rear wheels are covered, and the car's side mirrors have been replaced with video cameras that feed input to screens inset along the dashboard. ...