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Porsche Developing Electric Vehicles; 3 Electric Boxsters Slated for Testing

Green Car Congress

In addition to introducing the flywheel KERS equipped 911 GT3 R hybrid for production-based GT racing ( earlier post ) and the Cayenne S Hybrid ( earlier post ), Porsche earlier this year unveiled the plug-in hybrid Porsche 918 Spyder concept car. The flywheel power storage system is recharged whenever the driver applies the brakes.

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