Looks like Audi Q5, but it's worth looking at those black extension wings. Maybe it's Audi Q5-S or Q5-RS?
However, given the fact that the car was caught by spy-paparazzi at a time when he rode on a test range of Porsche's Nürburgring, have all chances to believe that this is nothing like an early version of the Porsche Cajun.
There is nothing surprising in the fact that "baby" Cayenne to be built on the basis of crossover Audi. While these spy shots and do not give fully understand how it will look next SUV Porsche, they still allow you to see in them the beginnings of a future crossover. It is expected that Cajun would be him more aggressive design, several versions of the engine and transmission.
