So what was a car that’s not being released for six months doing cruising around San Francisco? According to the ugly white lettering stuck to its side, the car runs on E85, a blend of 15 percent gasoline and 85 percent ethanol. We assume it is some type of demonstration or test vehicle. We were also surprised to see that it’s powered by Audi’s 2-liter turbocharged engine, which marks it as built for the European market. The European Union license plate was another clue. When it comes to the U.S. next year, it will come with a 3.2-liter V-6.