Not sure when they normally release this info. I would think that if it's not already out there, it will be soon.
Not sure if I would buy a Cayenne (turbo or otherwise). I hear they have a good number of problems along with its sibling, the VW Toureg. My vote would be an Infiniti FX45.
But there is no denying that engine in the Cayenne.....450hp twin turbo.....just insane!!