New details about the upcoming Audi e-tron model range have surfaced. Previewed by the original e-tron concept, the R8 e-Tron will be launched in 2012. The production for the vehicle will initially be limited to 100 units, but it will later be expanded to 1000 annually.

According to Rupert Stadler, Audi CEO, “We want to listen to the customer. It will be a different experience with the electric car in terms of usage, noise, torque quality and our engineers need to get familiar with customer needs.” This could mean that Audi may customize future e-trons according on initial customer input.

While pricing information hasn’t been released, Audi of America President Johan de Nysschen said the e-Tron will be the most expensive model in the Audi lineup. This means it will cost at least $156,300 USD (the price of the R8 5.2 quattro R tronic).

Meanwhile, the R4 e-tron still has not yet been officially green-lighted. But Stadler said “it would make sense” for Audi to build it. The R4 e-Tron concept was introduced at the 2010 North American International Auto Show. It featured two electric motors with a combined output of 150 kW (204 hp) and 2,650 Nm (1955 lb-ft) of torque.

Filip Brabec, Audi’s general manager of product palnning, said that more models for the e-tron are still in the pipeline. He said, “You can assume we’ll have not just one but two or three or even more electric cars.”