There's an article about the new diesel engined Porsche Cayenne SUV in Edmunds Inside Line. Unfortunately, there are no plans to distribute the diesel-powered Cayenne in North America.
http://www.edmunds.com/insideline/do/Drives/FirstDrives/articleId=141807
The Cayenne is based on the VW Touareg 2, with some suspension work by Porsche. The diesel engine is the stock VW 3.0L turbodiesel (236 hp, 405 lb-ft). The diesel Cayenne gets about 30 mpg on the highway, so its 26 gallon fuel tank gives the SUV a 700+ mile range.
Being a Porsche fan you either love or hate the Cayenne, but man, a turbo diesel Porsche to hit the roads less travelled sounds mighty nice :coffeedrink: .