Geneva 2019: Audi Previews Q4 E-Tron Concept, Rear-Biased Quattro Delivering 306 Hp Auto News Siew Weng | March 06, 2019 Six months after the launch of the Audi e-tron, the brand’s first foray into all-electric vehicles, Audi has unveiled the Q4 e-tron Concept at the ...