Porsche
First introduced in 2009, the Panamera has become a sales success - giving Porsche its first legitimate four-door sedan to compete with the likes of the Aston Martin Rapide, Bentley Flying Spur, and Maserati Quattroporte.
Like many of the company's other models, the various versions of the Panamera may be difficult to tell apart. However, like the Porsche 911, each iteration of the Panamera are differentiated by very subtle, but important differences. In the US, Porsche currently sells various versions of the Panamera in two different sizes and with 5 different engines.