The introduction of the 911 SC in 1978 represented a concerted effort by Porsche to appeal to a wider market than had hitherto been the case with earlier cars.

Zuffenhausen’s move to use the fully galvanised G-series chassis from 1976 onwards had presented an ideal opportunity to produce a 911 for all seasons; a tantalising prospect made all-the-more feasible by the introduction of the new 3.0-litre type-930 engine.

Featuring a stiffer die-cast aluminium crankcase in place of the 2.7-litre magnesium unit, the engine had been developed for the nascent 930 Turbo and featured Bosch K Jetronic electronic fuel injection rather than the earlier unit’s mechanical equivalent.

Although this resulted in a modest reduction in peak power, both flexibility and torque were improved, rendering the new unit ideally suited to everyday road use at variable speeds.

The 911 SC was an immediate success, with more than 60,000 cars constructed over its six-year lifespan.

In 1980—with a third of total SC...