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Audi joins BMW, Porsche and Aston in producing a more accessible GT4 racer Audi has become the latest European brand to confirm it will go GT4 racing, joining BMW with its M4 GT4, Porsche with its Cayman GT4, Aston Martin with its Vantage GT4 and KTM with its X-BOW GT4. GT4 racers like them and the Ford Mustang GT4 are less modified that the popular GT3 racers and therefore cheaper to produce and run. In the case of the Audi R8 LMS GT4, which made its world debut at the New York motor show overnight, Audi claims it’s closely related to the road-going R8 Coupe V10. Audi has offered the R8 LMS GT3 to customer race teams since 2009, after which it was replaced by a second-generation model in 2015, and also joined the TCR category with its RS 3 LMS in 2016. Slotting in between is the GT4 version of the R8 LMS racer, the newest addition to the Audi Sport customer racing program. “Directly derived from the road-approved Audi R8 Coupe V10, the GT4 is powerful and offe...