What is the length of the average modern Full-Size car?

Can they even dare stand to compete with the legendary lengths of clic full size cars? For example my 1960 Chevrolet Bel Air sedan stands at an impressive length of 17.5833333 feet and my 1964 Cadillac Coupe Deville trumps that at an amazing 18.62500 feet I'm sure their wheelbase along trumps most modern cars.