[happy1]

Hi,
I haven't driven Q7 and the Volvo, so this opinion is based on advertised prices and common sense, rather than detail experience with them.

The Q7 seems to cost almost double of a Territory Turbo petrol, but it seems you could have a Q7 diesel for about the same as a Q7 petrol.
These would be 10 years old now, with average km of 150.000 and upwards, so expect quite a few repairs both for the Audi and for the Ford.
I don't think it will be cheap ownership of either of these. For example replacing bushings in the suspension on the Territory Turbo, and transmission oil change etc will cost thousands. I am not familiar enough with the Audi to comment on service items on it, but expect parts to be more expensive.
Both 10 year old cars could have some oil leaks such as rear main seals on the engine, which are labor intensive to address.

This is a Ford forum, and the Territory Turbo is almost getting an Aussie classic with fewer left on the road now. The current price of petrol should give you a bargaining position to get one for less.

Have you test driven the Diesel Territory? It looks more modern than the SX/SY Territory, and the fuel economy is a lot better. Prices have fallen a lot on the SZ models, and you should find one for much less than same year Q7.
But the SZ isn't fault free either. If you drive mostly on the tarmac consider staying away from the 4x4 model, as the transfer cases have been trouble for many owners.
Cheers,