In the race to develop alternative fuel sources, inventors and engineers have explored some weird and wacky avenues. Here are five of our favourite unconventional fuels that have powered, or were planned to power, cars on the road.
Cars and Driving
Motoring's first power couple
Travel to the south of Germany, particularly around Stuttgart and they won’t let you forget that this is where the car first emerged at the end of the 19th century.
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