Originally Posted by gthal
What I said was that BMWs (including the M's) have, in fact, gotten heavier in each generation.
That was the case only the case with the Z4 because it got a hard-top and the 7 Series. But as both the 5 Series and the 6 Series are based on the 7 Seiries, they too got heavier. However, starting from the X3, both the 1 Series and 3 Series got lighter. So this trend is to continue. And next 7 Series might be CF.