BMW's first plug-in hybrid, the i8, just made its official debut at the Frankfurt Motor Show. In addition to sharing full specs -- including a 1.5-liter, turbocharged, three-cylinder engine; 362 horsepower with all-wheel drive and a fuel economy figure of 94 miles per gallon -- the German carmaker shared the model's substantial MSRP; the i8 will go for $135,925 and up when it arrives stateside in spring 2014. As we suspe
