One of the biggest hits at this year's Geneva Motor Show was the Porsche 918 concept. The super-slick plug-in hybrid surprised the automotive press with its good looks and green-monster powertrain.  Now, Porsche wants to actually build the thing. The U.K.'s Autocar says, "Porsche boss Michael Macht says that staff in the firm are fully committed to building the 918 Spyder, the biggest shock - and hit - of the ...

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