Revolvers require a little more TLC than autos and cannot stand up to abuse like auto's, but given equal care I don't see any reason why one should not be able to last as long as the other everything being equal.
That's funny. I shoot Colt 1873 Models. While I have 2 new ones, I've shot some of these guns that were built before the War, the Spanish-American War that is. You shot any autos that old?