Volkswagen has confirmed its XL1 Super Efficient Vehicle with a fuel consumption of around 313 mpg will go into production.
The XL1, whose footprint on the road is around the same as a Volkswagen Polo, although it is lower than a Porsche Boxster, can cover up to 30 miles on a plug-in charge with a total range of around 300 miles.
The two-seater has a drag co-efficient of less than 0.19, and uses a 0.8-litre two-cylinder 48bhp diesel engine, a 27bhp electric motor and a seven speed dual-clutch transmission.
Its fuel consumption of 0.9l/100km on the combined cycle equates to around 313mpg and CO2 emissions of 21g/km.
It weighs just 795kg and has a top speed of 100mph and can accelerate from 0-62mph in 12.7 seconds.
A limited amount of models will be destined for the UK, although it is not yet clear whether the car will be right-hand drive and how much it would cost.