In terms of the 928, in 1989, Porsche moved the game on with the even more powerful 928 GT which, with a top speed of around 170mph, was the Stuttgart firm's fastest production car at that time, before launching the model's ultimate incarnation, the 928 GTS.

Introduced at the Frankfurt Motor Show in 1991, the latter featured an enlarged 5,397cc DOHC 32-valve V8 that developed some 345bhp and 369lb/ft of torque and automatics were fitted with the much faster responding Dynamic Kickdown gearboxes setting them apart from previous models.

Riding on special five-spoke 17" 'Cup' alloys, it further benefited from four-wheel vented-disc ABS brakes (complete with four-pot Brembo callipers) and a computer-controlled limited-slip differential.

Externally, the GTS differed from the S4 by its more aggressive and muscular styling, widened rear wings to accommodate larger tyres, a distinctive continuous red light strip connecting the rear lights and a body-coloured rear spoiler.

What Porsche was...