The AC Petite is a three-wheeled British microcar with a rear-mounted Villiers single cylinder, two-stroke engine. The car has a single bench seat seating two adults, and was said to be capable of to and .
There were two versions of the car. Between 1952 and 1955 the car was fitted with a Villiers 27B engine and two different sizes of wheel; the rears were spoked wheels whilst the front was only . In 1955 a Mark II version was launched, incorporating minor changes to the exterior trim, a slightly more powerful Villiers 28B engine and wheels front and rear.
Approximately 4,000 AC Petites were built until 1957.