The 342mph Environmentally Friendly Supercar

The Acabion GTBO can hit staggering speeds at up to 90 miles per gallon - the sort of fuel consumption you’d be thrilled to achieve in a small, super-efficient diesel car.

Accelerating from 0-224mph in 20 seconds, it will leave any Ferrari standing

Even though the Swiss car can hit almost 350mph, its top speed is limited to 292mph -still far quicker than the world’s current fastest road car, the 253mph Bugatti Veyron.

It also trumps the huge Bugatti’s 16.4litre engine - with a capacity of just 1.4 litres.