Originally Posted by
roadwarriorafrica
If your stopover is 8 hours or more, and there are no connecting flights before, then you may be entitled to a free stopover.
Any passport holder can go on the Doha city tour, though this runs during the day only.
There is a hotel at the airport, where you can get a room for around US$250 for 8 hours.
There is also a pay lounge - The Oryx lounge.
The OP says the flights were paid for with Avios, it's unlikely QR will pay for a hotel under those circumstances.