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Porsche
Not too long ago, the words Porsche and Hybrid would never have seemed to belong together. Now, Porsche's about to put its second on the market, the Panamera Hybrid four-door, and it's announced it will produce this car, the 918 Spyder.

The concept version of this plug-in hybrid concept sports car combined a 500-horsepower V8 engine with electric motors in the front and rear axles that could deliver an additional 218 horsepower. The production version is expected to cost over $600,000.



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Last updated March 15 2011: 6:51 AM ET
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