Moss at age 25 would certainly be in the running for me. I ran across this article in the doctor's office a while back and was blown away.
Read it... it's not that long. If you're not impressed, you're not thinking clearly. It takes a lot more skill to do this than to run on a track:
1955 Mille Miglia: The Most Epic Drive. Ever. - Motor Trend Classic
1955 Mille Miglia: The Most Epic Drive. Ever.
1000 Miles on Italian Roads in 10 hours, 7 minutes
Excerpts:
"Entering the main street of Padova at 150mph we braked for the right-angle at the end, and suddenly I realized that Moss was beginning to work furiously on the steering wheel, for we were arriving at the corner much too fast and it seemed doubtful whether we could stop in time. I sat fascinated, watching Moss working away to keep control, and was so intrigued to follow his every action and live every inch of the way with him, that I completely forgot to be scared."
"The grimy, dented 3000SLR came around the final corner of the Mille Miglia in downtown Brescia with Moss holding it in a 100 mph powerslide to cross the finish line precisely 10 hours, 7 minutes, and 48 seconds after he had rolled the car off the starting ramp and powered down the road to Verona. Moss and Jenkinson had averaged almost 98 mph for 1000 miles, shattering the existing record by almost 10 mph."