Cutting-edge hybrid supercars
The BMW i8 concept car has a glowing blue grille that opens and closes, depending on how much cooling the engine requires.
BMW expects production to start in early 2014. The BMW i8 is a plug-in hybrid, which plugs in to be recharged instead of using the gasoline engine exclusively to recharge the battery like most other hybrids. The BMW i8 also saves fuel by using a three-cylinder engine. Most other hybrids have four-cylinder engines.