Not sure, but the X5 is a good deal wider than the X1 and bigger, so doubtful.
(And I'd love to hear your thoughts on both the Countryman and X1. I've been vaguely intrigued with both of them recently)
And as always, welcome to Bfest!
2011 BMW X5 xDrive 35d Vermillion Red Metallic/Black Nevada Leather
Options: ZCW, ZPP, ZRC, ZTP, 300, 386, 496, 4AB, 6FL, Combox, LED Coronas. 04/11 Production