I understand the Alfa I have is FWD...Can't aford 19's anyway the 18's look great, just need re-coated,previous owner liked parking too close to the kerb, think in graphite. Will def go for 135 45's all round when needed.
Drifting impossible unfortunately due to the FWD..hmm.. RWD conversion? What's the set up on the Q4's tire wise, torque split bias to the rear.
BTW why would you need to keep the rears the same as the front? Would the cars handling be upset that much, more prone to understeer or what?