Porsche is introducing the Panamera Diesel as the long-distance comfort sedan for this series. With its 80-liter fuel tank, the car is able to travel more than 1,200 kilometers non-stop. Yet the Gran Turismo's 84 kilowatt engine is still economical, needing only 6.5 liters to travel 100 kilometers.With low friction tires, the car is even less expensive to run, with consumption going down to 6.3 liters. But with a starting price of 80,183 euros in Germany only the well-heeled will get the chance to drive one.