I saw a nice new 530i the other day, and for some reason it looked kinda LONG.
The 5 series has always looked significantly shorter to me than the 6.
So I looked up the dimensions to compare the 5 series to the 6 series, and I was really surprised to find that some 6 series are only an inch or 2 longer than the 5! Wow! So I guess the 5 series has been slowly growing, enough to end the 6 series entirely.
The 6 series has always been a little wider and lower than the 5. A much more beautiful car. I think some people buy a 5 because they might think the 6 is too big. Wrong. So glad I got a 6.