GT is a slightly sportier version of the S4 with an extra 10bhp and a short-shifting close-ratio five-speed manual gearbox and sports seats, but standard suspension settings. Rare and sought after. However, the GTS that replaced it in 1992 was the ultimate 928. The engine has a long-stroke crank to take it out to 5.4 litres and 350bhp, while the body is revised with widened rear arches to take larger ‘Cup’ design 17in alloy wheels. A body-colour rear spoiler and teardrop mirrors also help bring the styling up to date. Both manual and automatic versions were offered.
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Information from Octane Magazine.