I'm getting about 25mpg to my X5 which isn't that bad as I cane it, as I've got a fuel card. I could get a lot more if I took it easy.

Other half's Dad has a Cayenne (non turbo) he's not the slowest of drivers and mainly does motorway runs and he's getting roughly mid 20's. He's chopping it in for a VW equivalent of some sort, but I don't think its the Tourag or whatever it is although its pretty fancy and apparently parks itself

Both are pig ugly. I much prefer the Landcruisers