Audi A2 E-Tron from the front three-quarter angle AudiThe new A2 E-Tron manages to capture all that, while making it look sportier and more aggressive. The version Audi showed is one with what the company calls the efficiency package, which gives the new A2 a drag coefficient of 0.24. Audi A2 E-Tron from the side AudiNot only is the efficiency package A2 the most aerodynamic trim, but it will be the most aerodynamic Audi you can get, period. Audi A2 E-Tron from the front AudiIn the case of the preview vehicle, the pack is paired with a 188-horsepower electric motor at the back. As a reminder, you cannot buy a more efficient car in the US than the Lucid Air Pure.