The Crompton was a prototype electric car built by Leyland in 1972.
The car was first shown at the 1972 Geneva Motor Show.
The Crompton was designed by Michelotti and based on standard mini parts. It has 24 lead-acid batterys which drove two 3.9 horsepower electric motors. It had a range of 40 miles and came with a plug so it could be plugged into the mains and charged at home.
At the time, it was estimated that the running costs would be less than a penny a mile. The car was not designed for production and would only be so if there was a significant advancement in battery technology to make them lighter, although this has still not happened to this day. With the weight of all of the batteries it weighed 1.33 times as a mini.