I like how you "picked" the last year before the 6.4 hit the scene. Might be a bit more realistic to use at least a 2011, or even better a 2015 when the A8 was added. Much more of them running around and faster than anything on your list without even jumping up to the Hellcats.
2015 Dodge Challenger 0-60 Times and Quarter Mile
BTW, I suspect the listings in the above link aren't completely accurate as they all say 6 speed while I bet the numbers are for the A8.