well, coming from vettes, Z-28s, I have seen 150 in them many times over the years, but my speedo in the XF was at 160 in 9/10th of a mile from a standing start...that my z's nor vette's could do. I had just installed the code 3 pulley...now that I have a tune, the limiter is raised to 190, but no where to try it out. This little car is more stable than my old muscle cars by far...except for the Z06, this little car is a sleeper for sure...now the new vette...that is the only car I would give up my little xf for...that is an awsom car...