Apparently Porsche is close to making a final decision on whether to add a sedan to its portfolio. A lot of info has already been released on this vehicle, including its name, Panamera, which was registered by Porsche at the same time it registered the Cayman name. Earlier reports had the sedan appearing in 2009, but that date seems to have been moved up to 2008. No official word has come yet either on whether or not Porsche will work with VW again in the same manner it did with the Cayenne. Engines are expected to be based on the same 4.5L V8 motors found in the Cayenne and include naturally aspirated and turbo variants. If the Panamera does get approved, we can't wait to see a head-to-head comparo against the MB CLS500.