Audi R4 eTron rendering

Following our head to head comparison between the Mercedes SLS EV and the Audo eTron, various speculative renderings of what the future Audi R4 eTron might look like are doing the rounds. The Audi R4 will be the production version of the eTron electric car concept shown off at the Frankfurt Motor Show in September.

Slotted between the Audi TT and the Audi R8, the all-electric R4 will likely have conventional combustion engine options as well. It will possibly share a platform with the Porsche Cayman, and the upcoming Boxster, and should utilize aspects of the Aluminum Space Frame.

Expect the electric model to run on lithium-ion batteries, sending power to electric motors mounted in-board on each wheel. Expect these four motors to combine for well over the Tesla Roadster's output of 248 horsepower. Because of a robust amount of torque, expect the TT Coupe's 6.6-second time to be shattered by the R4.

A full-charge may be able to take the R4 155 miles without plugging in, but that may not be enough to lure Tesla Roadster customers.

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