From the moment it was unveiled to a surprised world at the Geneva Auto Show, the 918 Spyder concept super-eco-sports car has been building a head of steam to actually reach production. The 78 mpg, 0-60 mph in 3 seconds, plug-in hybrid certainly has built up a large cult following in the few weeks since its introduction. I don’t think Porsche will have trouble finding the firm orders necessary to make a case for building it.