That’d kill sales for the V10 I think (and lambo). Agreed the v10 is exotic, and I personally would rather have the motor from the rs7/s8 in there, but I’m not lining up at Audi with my checkbook either, so my opinion doesn’t matter much.
I think one of the coolest “common” builds out there is the UR TT V8 R8. Just seems like the power a car that good looking really deserves.
You also have to think, Audi doesn’t want to encroach too much on lambo’s sells of the ultra performance cars. And I really really don’t see lambo putting a TT motor any anything short of their flagship cars, not the gallardos. A TT R8 could have a strong possibility of swaying the horsepower junkies away from buying a new gallardo or the such. A TT R8 would compete really nicely with the 911turbo/GT2. It’d be really cool to see them go up against that.
Car manufactures are really really good at leaving the model below just a hair shy of the next model up. Sometimes they spend more efforts keeping the lower end models from being too good to protect the next model up (335 vs M3, Cayman S vs 911 Carrera, C63 vs E63, S7/RS7 vs S8, etc).