Casting around for a replacement for the ageing 2-Litre, AC took up a design by John Tojeiro that used a light, ladder-type tubular frame, all independent transverse leaf spring suspension, and an open two-seater alloy body made using English wheeling machines, possibly inspired by the Ferrari 166 MM barchetta.

Joining the Ace in 1954 was the Aceca hard top coupé, which had an early form of hatchback rear door but used the same basic timber framed alloy body.

From 1956, there was the option of Bristol Cars' two-litre 120 bhp (89 kW) straight-six with 3 downdraught carburettors and slick four-speed gearbox.

For the Ace as well as the Aceca, AC used chassis numbers beginning with AE for AC-engined cars, BE for Bristol-engined ones, and RS for those equipped with the Ford unit.

In the 1959 24 Hours of Le Mans, Ted Whiteaway and John Turner drove their AC Ace Bristol, registration 650BPK, to the finish, claiming top honours for the 2,000cc GT class and seventh overall behind six 3 litre cars.

Cars were sold in Germany, France and England, with sales in Luxembourg, Holland, Lichtenstein, Switzerland, and Belgium slated for the future.