Audi’s electric vehicle lineup currently consists of two SUVs and a sports car, each available in a variety of flavors. From a price perspective, it all starts with this Q4 e-tron, here as the coupe-styled Sportback. Unlike the four other Q-named SUVs Audi sells, the midsize Q4 is the only one that’s sold exclusively as an EV. With a starting MSRP of just under $50,000, it is the gateway to …