The AC Petite is a three-wheeled British microcar with a rear-mounted 350 cc (21 cu in) Villiers single cylinder, two-stroke engine.

[1] The car has a single bench seat seating two adults, and was said to be capable of 60 mpg‑imp (4.7 L/100 km; 50 mpg‑US) to 70 mpg‑imp (4.0 L/100 km; 58 mpg‑US) and 40 mph (64 km/h).

Between 1952 and 1955 the car was fitted with a Villiers 27B engine and two different sizes of wheel; the rears were 18-inch (460 mm) spoked wheels whilst the front was only 8 inches (200 mm).

[1] In 1955 a Mark II version was launched, incorporating minor changes to the exterior trim, a slightly more powerful Villiers 28B engine and 12-inch (300 mm) wheels front and rear.

[1] Approximately 4,000 AC Petites were built until 1957.