“Volkswagen has made a car it says can travel 313 miles on a gallon of diesel, and that emits just 24 grammes of carbon dioxide per kilometre travelled.

The XL1, which seats two adults, combines a 0.8 litre two cylinder diesel engine with an electric motor. The car is constructed around a carbon fibre reinforced polymer monocoque to reduce the weight to just 795 kilos. German rival BMW is also making an electric carbon fibre car, while Mercedes is to make carbon fibre parts.”

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Tags: cars, fuel efficiency, global warming, Volkswagon