I went 120 in my Dad's '65 Impala when I was sixteen. I've been a passenger in a teen buddy's Torino going faster, but it was so long ago that I can't remember how fast.
On my way from my college graduation I was driving with another buddy in an '85 Chevette (say "shove-it")... We were passing many cars and my brother could not keep up in his Izuzu Trooper, but my speedo was barely struggling to read 55. I found out later that I was over 90 in that thing! Not the fastest, but likely the most dangerous of my adventures.