The premium Ingolstadt-based German automaker Audi recently nailed a fresh Guinness World Record with a slippery Audi A6 e-tron Sportback going way further than its official range – 831 miles or 1,338 km on a single charge. An Audi SQ7, on the other hand, will never lay claim to any hypermiling qualities.
There are always plenty of caveats when diffe... (continue reading...)