Ссылка не работает = раз (возможно пока)
0.30 это официально заявленная цифра ресурсом http://www.autotrader.com но не производителем = два
Ждем дальше.
The Accent 4-door has an exceptional coefficient of drag, estimated at a mere 0.30, thanks in part to the aerodynamic improvements in its design. Such improvements include its aerodynamic body, shielded tire and optimized engine undercover to help minimize resistance.