Originally Posted by Pharmacist

Again, I'm not debating that. I have no doubt the new mustang has very good handling and is no slouch. And I wouldn't be surprised if it understeers less than the Z. After all it does have a square set up. You get 255 mm tires all over, which are quite large for front tires, but on the skinny side for rear tires. I actually think 245 mm are too skinny for front tires on the z, especially given the forward weight bias. That may be responsible for much of the understeer. 255 or even 265 mm fronts may be better.

I still don't think the mustang can carry as much momentum through corners as the z. If it laps a track on average at the same time as the z, give or take a second or so, then it has to be losing time somewhere given that it gains a lot of time over the z on the straights. I don't remember the C&D article. I'll check it when I go home. I do remember that in the recent DSport RWD car of the year, the mustang was a bit slower than the z, and actually was even slower than the camaro ss. Can't remember which track they did the testing though.