the 2005+ model A4 saloons has very little head rear room, but i do believe the boot is every so slightly bigger in the saloon in length compared to the avant estate version (not sure how).
but even the a4 isn't that big.
i wasn't sure what to expect from the e91 touring, but it doesn't offer that much more space in in than our Golf.
would be nice to be able to put the pram in with enough room comfortably say a weekly supermarket shop say.
just when the e91 m sport was growing on me LOL