The 24 Hours of Le Mans has always been a laboratory for wild automotive technology—part sporting event, part science fiction. On Sunday, at the 80th running of the world's most famous endurance race, a hybrid racing car won for the first time. Audi's 200-mph R18 e-tron quattro took the checkered flag in front of 240,000 fans, in the hands of German driver André Lotterer. The winning hybrid, nicknamed "Electra" by the Audi team, traveled 3,201.18 miles over the 24 hours—the rough equivalent of Miami to Seattle.