I know there are issues with some of the 2.0 TFSI engines - mine (A5 2.0 TFSI 211) had a rebuild with new cylinder heads and comms rods following an "oil consumption test" by Audi
Is it in warranty ?
Nope it's old now (56 plate) and getting replaced with a brand new TT this week anyway
The next owner can deal with the constant oil refills!