After debuting the concept at the 2013 Frankfurt Motor Show, Audi is showing off the Audi Sport Quattro plug-in hybrid as a thanks to its Facebook fans, which now exceeds 100,000. Some speculate that the Quattro will receive the same 700-hp plug-in hybrid powerplant as the Audi R8 V10 Plus — a 4.0-liter twin-turbo V8 that’s paired with an electric motor and eight-speed tiptronic transmission, and pulls off an astonishing 94.1 mpg. Stay tuned for more info regarding production details.