1 stone = 14 pounds. 180 Stones would be roughly 2,520 pounds
if driver is 180 pounds tho, that's just a hair under 13 Stones.
only reason i know stones is i follow tri-nations rugby and all of the players are measured in stones.
if you want to have fun with your girl next time she asks the inevitable "do i look fat" or "how much do you think i weigh?" reply how much you think she weighs in stones
however, i don't recommend this if she is the type that would go look up how much a stone is