Re:Anyone own 3 or 5 series estate (touring)
When the touring concept hit production on the e30 in the mid 80's, it was never intended on being an estate. The car is exactly the same length and width, same chassis as a standard 3, with the additional room to take extra baggage, for longer distance trips. Hence 'touring'. The original 3 series touring (having first tried the concept with the 02 models in the 1970s) had a nearer 50:50 weight split and better aerodynamics. It combined the improved stowage without compromising the legendary driving and handling characteristics.
The reason for the memory lane indulgance was to explain the 'touring' concept. They were never intended as true estates. Without looking for dimensons, I'm only 80% sure the ethos is still applicable. Look at it as a bigger 3. If it has enough room for your needs, then great. Though IIRC a 5 touring is truly cavernous!