Fiat - now and days of yore

The Phactors rented a Fiat 500L diesel, and it's been an impressive car to drive, not at all what TPP expected, but then he hadn't driven a Fiat since a friend had a Spider way back in the mid-1970s there abouts. While parking the rental, TPP was surprised to notice that the tiny car parked in the next space was also a Fiat 500L from about the late 1960s (sorry, really don't know Fiats well at all).  It looked to be in very good shape and probably had the classic, whomping, stomping 2-cylinder 500 cc engine. That's less than half the engine of the smallest engine car TPP has ever had, a little old late model Toyota hatch back that was his Queensland car. If remembered correctly it had a 1300 cc engine that could really snap your head back. Any Fiat Fanatics out there that can provide some information?