Porsche 918 Coupe

  • 2011 Porsche 918 RSR Concept. Photo by Joe Nuxoll.

    Possibly the most rapturously received vehicle at last week's Detroit Auto Show was the Porsche 918 RSR coupe, a hybrid race car that isn't even street-legal. And it's about as far from the quintessential Toyota Prius hybrid as you could get. It doesn't use a battery pack at all, in fact, but the flywheel-based Kinetic Energy Recovery System (KERS) that the company's engineers first installed in the one-off Porsche 911 GT3 R Hybrid factory racer. After a heart-breaking retirement less than two hours before the end of the 24 Hours of Nurburgring this summer, that car (running in a class of...

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