Like its production predecessor, the original A2, the four-door concept shown above was constructed mostly of aluminum. The Audi concept also incorporated carbon-fiber-reinforced polymer and other lightweight materials to minimize mass – the four-passenger hatchback weighed just over 2,500 pounds. The 2011 A2 concept was engineered with a "sandwich floor" construction not entirely dissimilar to that of the original A-Class. The construction method allowed the A2's lithium-ion battery pack to reside beneath the passenger compartment, while its 114 horsepower motor drove a single-speed transmission sending power to the front wheels. After a reasonably quick four-hour charge, it was expected to deliver a range of about 125 miles.
Had the program received the green light, the A2 was expected to be released in 2014 as both a pure EV and as a plug-in hybrid.