For a company that has focused mainly on practical cars that have advanced technology and efficiency on four wheels, Audi has a history of producing some stellar sports cars. From the TT to the R8, Audi has provided a credible challenge to the very best performance cars in their respective segments. Both have now sadly experienced their final deaths in the last few years, with no obvious replacement for either, but did you know that there could have been another sports car that was going to sit in between them, called the Audi R4, that never saw the light of day?
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