Audi has revealed its new e-tron Sportback concept at the Shanghai Auto Show. The all-wheel drive, all-electric car is powered by three motors delivering up to 370 kW - for a 0-62mph time of just 4.5 seconds an a top speed of around 130mph. Audi claims a driving range of over 310 miles for the e-tron Sportback, which isset to enter series production in 2019.