Volkswagen has introduced in Geneva the XL1 which is being advertised as the most efficient production car in the world.
The two-seater tips the scales at only 795 kg (1,752 lbs) and features a plug-in hybrid system featuring a two-cylinder TDI engine with 48 HP (35 kW), an electric motor with 27 HP (20 kW), a seven-speed DSG and a 5.5 kWh lithium-ion battery. It will do the 0-62 mph (0-100 km/h) sprint in 12.7 seconds before reaching a limited top speed of 100 mph (162 km/h).
The most impressive numbers of the XL1 are related to its fuel consumption which stands at only 0.9 liters / 100 km (261 mpg US or 313 mpg UK) with CO2 emissions of 21 g/km. It can be driven for up to 31 miles (50 km) in electric mode, while with the fuel tank filled it will do 499 km (310 miles).
Although you can't really tell from these images, the Volkswagen XL1 is actually shorter than a Polo and lower than a Porsche Boxster. It's 3888mm long, 1665mm wide and 1153mm tall.
More details are available in the press release section and at the related link below.