The 1989 Audi 90 Quattro IMSA GTO is widely known as one of the most extreme race cars of the IMSA era, featuring aggressive styling and advanced technology for its time.

Sedan sales continue to wane, and luxury brands such as Jaguar, Infiniti, and Volvo have abandoned the segment entirely. But a new A6 shows that Audi remains committed to the sedan. We approve of its ...