This is the latest version of VW's tandem L1 project, so-called because of its ability to travel 100km on one litre of fuel.

The two-seater was due to be unveiled at the Frankfurt motor show on Tuesday, but early pictures and details were revealed by the German media over the weekend.

See the high-res VW L1 pictures

The reports suggest the car, which is powered by a 29bhp two-cylinder diesel linked to a seven-speed DSG gearbox and weighs around 380kg, will achieve 189.6mpg.

VW originally showed a one-litre concept in 2002, although the exotic lightweight materials used to build it made it to expensive to consider for production.

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