What would people expect as a suitable car for a loaner? I don't have the wording in front of me, but perhaps they believe a suitable car is a 'luxury car' and that's defined as an Audi (luxury dealer), vs. giving you a Ford and they pay for the rental (which has happened to me before.)
Would an R8 be comparable? or even if they had them to loan, would everyone feel comfortable driving it? (parking it?) Or an A7 would be nice, but what dealership can afford to keep a fleet of A7s available for long term for warranty work? Guessing Q3 and Q5, with the random Q7 thrown in here or there would be most prevalent. Sure, they're not equivalent to the GT, but it's better than a random 2 door rental from a non-luxury brand.