Even then the original in-house engine remained an option, although in 1961 when Bristol pulled out of engine production, AC began to fit the Ace with a Ford Zephyr engine.
This switch provided its fair share of headaches for the AC’s engineering team, involving them with a chassis modification and the need to redesign the model’s entire front end.
The new engine did bring some stunning results, with sports car aficionados regarding the AC Ace 2.6 version as the best and most powerful ever, with a top speed of 125 mph (201 km/h).
Despite that ability, only 37 versionS of the AC 2.6 were ever produced as the car began to be phased out, to be replaced by the AC Cobra.
AC did take full advantage of 'Ace' theme’s success by producing two “ spin-offs” the Aceca closed coupe unveiled in 1954 and a four-seater version, the Greyhound, built on a stretched Ace chassis.
As the production run unfolded, the splendid AC Ace was handed a number of improvements, among them being fitted with overdrive from 1956, front-wheel disc brakes from 1957, and 15in wheels from 1959.
By that time the Ace was proving to be a top seller, despite strong competition and its heavy price tage.
Other variations on the 'Ace' theme included the Aceca closed coupe unveiled in 1954 and a four-seat Greyhound built on a stretched Ace chassis.
By 1961 when the Ace was being discontinued, the car had played a major part in AC having reinvented itself as a sports car manufacturer to be reckoned with.