So my marq is faster than the maro
 

I just did a very unscientific test. From a stop I floord it in my marq (last night) and my camaro (just now). At the same tree I was doing 75 in the grand marquis. In the camaro I was only doing 60 at most.

Turns out the Grand Marqusi has a 3.08 (non posi) rear. The camaro only has a 2.7X non posi rear.