concept car - The Mazda Senku concept car, making its Chinese premiere, features a cutting-edge powertrain and oversize, electrically operated flying-wing doors--but don't call it a DeLorean. The gasoline-powered rotary engine is complemented by a hybrid electric unit, and solar panels provide recharging for the batteries. The name 'Senku' is a Japanese term that means 'pioneer,' Mazda says. Credit: Mazda