Audi struck a chord with this sexy new offering called the e-tron electric concept car. the e-tron uses four electric motors with a combined output of 313 horsepower (and a mind-boggling 3,319 lb-ft of torque) to move its 3,527-pound mass to 62 mph in 4.8 seconds. More impressive is its rolling acceleration from 37-75 mph in just 4.1 seconds. The top speed is electronically-limited to 124 mph. According to Audi, we’ll see a production version in 2012.