The Audi E-Tron Quattro races at the 2015 Lone Star Le Mans.
Audi reveals even more efficient 2015 E-Tron Quattro
Video: Audi E-Tron Quattro - High-speed Fly-bys with Audi& .
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— Audi e-Tron Quattro
audi opted to go with a closed canopy design for its latest le mans prototype, the for the first time since the automaker abandoned the open top design to improve aerodynamics and reduce driver fatigue.