It wasn’t too long ago that we brought you the story of the brilliantly cool Auto Union Type 52 Schnellsportwagen . This was a car that, before this coachbuilt creation, existed on paper only, as Auto Union had the plans ready but never got around to actually building it for various reasons. Along the same concept, Audi Tradition now transports us back to the 1930s once more, with the Auto Union Lucca. The era of the Grand Prix cars is forever etched in history thanks to the ‘Silver Arrow’ racing cars by Auto Union and Mercedes-Benz . But this Auto Union Lucca is a tribute of a different kind, as it remembers the record-setting 1935 run of Hans Stuck just outside of Lucca, Italy.  The Lucca car during the record runs in Italy (14-15 February 1935). The 1920s and 1930s were marked by many things, but when it comes to racing, it’s best remembered for a total and relentless pursuit of speed.…