When it comes to fuel efficiency, gas-electric hybrids reward those who drive sensibly and smoothly. Do this, and mileage is high enough to give oil sheiks nightmares. But most midsize hybrids lack a luxury nam...

KLETTWITZ, Germany — It’s a motor rally with a difference: souped-up “green” vehicles going head to head in an international eco-marathon to see who runs the longest on as little energy as possible. (more&he...

Porsche is to use more hybrid powertrains and lightweight materials to improve the efficiency of its vehicles — but insiders say the firm will still try to tailor the eco tech to deliver a rewarding drivi...