What is "powerdrive"

The Powerdrive was a three-wheeled microcar with a rear-mounted Anzani two cylinder, two stroke engine.

The car was designed by David Gottleib, whose Powerdrive company had previously worked with the Allard Motor Company on the development of the abortive Allard Clipper. Like the Clipper, the Powerdrive was devised to exploit the lower tax rate then applicable in the UK to three wheeled vehicles weighing less than . Physically, the Powerdrive was larger than other cars in this class, with full-size 13-inch wheels and a large amount of luggage space at both the front and rear. The car's design and styling attracted much praise at its launch at the Dorchester Hotel in London in July 1955.