Audi A2

Over the past few years, Audi has teased us with a number of reasons to think that the automaker's next-generation A2 may be offered with an electric-only powertrain, or maybe with some type of plug-in hybrid option.

Back in March, the rumormill blazed with reports that the upcoming "state-of-the-art" A2 will tip the scales at a scant 1,800 pounds. Here's hoping such a low weight target doesn't imply that Audi's use of unobtanium materials will interrupt the debut of the A2.

New rumors have popped up that Audi will unveil its European-only electric A2 e-tron concept at the 2011 Frankfurt Motor Show this September. We'll believe it when we see it.

According to internet buzz, deciding on powertrains to pack into the compact A2 and setting an aggressive weight target has pushed back the vehicle's launch until... well, sometime before the end of this decade.