The Solvang Double Century is 192 miles, so, a Century must be 96 miles or greater chopped up however you want during one day. That's Cali rules. Your 85 miles is 7 miles short. Sorry. (Math is bad in Cali, too)
In England, one may not stop even to pee to get The Club Patch. I think 100 Imperial miles is like 125 miles sort of like their gallons are bigger, too. And a pint must be 20 oz over there.