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The German automaker also participated in IMSA with the 1989 Audi 90 quattro IMSA GTO, a five-cylinder, 720-hp behemoth. Related: 10,000 miles in the best $100K sports car you can buy. The 2025 Audi ...

paying homage to the iconic Audi 90 Quattro IMSA GTO race car. The RS6 Avant GT gains a retuned 4.0-liter twin-turbo V8 ...

Prices shown are the prices you can expect to pay for a 1991 Audi 90 Quattro 4 Door Sedan across different levels of condition. Edit options.

The 2025 Audi RS 6 Avant GT is the company's tribute to the 90 quattro IMSA GTO car, and is touted as the fastest RS 6 Avant to date. This AWD speed wagon is powered by a 4.0L biturbo V8 ...