Both all stock, no mods, and well over 100,000 miles at the time:
1999 Saab 9-3 SE has been over 140mph a few times (144 indicated on the way back down) with two passengers, but now with minor body damage and almost 180,000 miles on it, I don't think we'll be testing the upper end again in that car!
1994 Acura Integra GSR 4-door spent a lot of time over 140, the fastest indicated between 148-152 mph, but my friend's motorcycle was reading well over 155 when we lifted for an upcoming turn (he was in the next lane). I trust the car's reading more.
I've driven faster, but not in my own car, so that info is classified.