For 2014, Porsche stuck its neck out and attempted to improve upon a good thing: the Panamera. After its initial launch in 2009, the four-door luxury sedan quickly became one of the brand’s best sellers. Entering its second generation, the Panamera has more power, more efficiency, and sleeker lines. But has the addition of a new twin-turbo V6 and a plug-in hybrid to the nine model lineup improved the breed or simply sullied it? Check out the full first-drive report to find out.