Retrospectively known as the Series III, the redesigned V8 model Aston Martin was phased into production during July, 1973, and was a response to concerns over forthcoming American emission control regulations.

Marking a switch from the troublesome Bosch fuel injection to quad twin-choke 42mm Weber carburation, the newcomer was visually distinguishable by an enlarged air intake, an elegant, elongated bonnet ‘power bulge’ and an altered rear window base panel.

The Series III utilised the same steel platform chassis as its predecessor, complete with independent double-wishbone front suspension, a Watts linkage-located de Dion rear axle, power-assisted rack-and-pinion steering.

The luxury GT benefitted from improved engine and transmission cooling and a revised petrol tank design, which boosted luggage space.

Other improvements included a revamp of the two-plus-two interior with revised seats and rearranged switchgear.

Initially developing some 310bhp, its cleaner-running and less te...