Your Audi will consume half the fuel though. LOL
The room in my LR3 was nice but our Audi is much quieter inside.
Personal preference

Bottom line if your maintenance is up to date, shouldn't be a problem.

 

I do keep the maintenance current and with 175K my 07 LR3 would have no issue with that trip. Just did 2700 mi to Utah (Lake Powell) and back to Denver with 50% off road over some insane almost non roads I have ever seen.
Have fun and motor safely, I think it would be mostly other drivers that would be my major concern.

 

...just make sure your coolant system is in good shape. I'd consider changing all the hoses and T-stat if that hasn't been done yet; and of course by-pass that stupid plastic bleeder valve.

 

A digital copy of the RAVE and key repair videos stored in a thumb drive. I keep it in my glove box.

 

I had intended to replace the plastic blender valve but the '07 has no valve, just straight through piping.

 

Ive done Nova Scotia to Saskatchewan and back a couple of times in my earlier 06 LR3 a few years back with no issues. As others have said - make sure the basics are taken care of and get on the road. If something breaks that is unexpected, that's part of a road trip and you find a way to deal with it