Concept Cars

Chelsea, Michigan - For some, Chrysler's ecoVoyager Concept looks like a private jet. Others see an egg on four wheels. The most cynical critics will compare it to the Previa of the nineties. Introduced in January at the 2008 Detroit Auto Show, this prototype of a futuristic sedan (only 1.4-centimeter shorter than a Chrysler Sebring) is ultra-modern yet ultra-simple.

To bolster its position as a green automaker, Volkswagen developed a fuel-cell variant of its all-new Tiguan compact SUV.The Tiguan HyMotion Concept runs solely on hydrogen. It produces no tailpipe emissions, as clean water vapor is the only byproduct of fuel cell vehicles. Volkswagen debuted the vehicle at the last Bidendum Challenge in Shanghai -- an international competition aiming to promote sustainable automotive development.

After the stunning R8 TDI Le Mans, which boasts a 6.0-liter V12 diesel engine that produces 500 horsepower and 738 lb-ft of torque, Audi is presenting yet another diesel-engined race car concept. The A3 TDI clubsport quattro is powered by a turbocharged 2.0-liter, common-rail inline-4 diesel engine. It produces 224 horsepower and a stump-pulling 332 lb-ft of torque, and is mated to a 6-speed manual transmission. All this power is directed to all four wheels via Audi's quattro system.