Fastest I ever went was in the first car I owned, which had been my grampa's 74 Ford Maverick.
Damn, that's the exact color and trim package, too, down to the vinyl roof and rubrail... probably has the woodgrained plastic dash and vinyl bucket seats, too. All that luxury... anyway, gramps drove caddys all his life, this was his last car, but he didn't believe in less than a V-8, so he ordered it with the 302 CI V-8 instead of the 200 CI standard straight 6. Mind you, this was in a 1700 lb car...
So anyway, I'm going back to my first year of college after spring break, and I'm on the Ohio turnpike. A corvette stingray passes me. I returned the favor. We go back and forth a few times, and I'm up over 100 mph. Then it got serious.
The speedometer only went to 120 mph. I pegged it, and broke the damn thing that day. Blew the doors off the corvette one last time, and then spotted my exit. And, as I slowed and exited. the corvette blasted past.
Followed by two Ohio State Troopers.
It was a good day. The Maverick forever had 64,000 miles on it and I had to guesstimate speeds after that, but it never let me down for another two years. After which I got my first VW bus, and never hit that kind of speed again.