http://f80.bimmerpost.com/forums/sho...d.php?t=923444
Looks like the official number is 51 Lbs which is roughly 22 kilos. About a 1.75% difference in weight. It will be interesting to see how BMW prices the two models given that they both have carbon fiber roofs etc where in the E9x versions there was a few more differences to justify a slight discount for the sedan versus the coupe.