It's in Dutch, but seems to be a new version of the current boxer engine... most of the bike is the same but new fairing panels, windscreen, brake/clutch reservoirs, plus, I am sure, more changes that I can't decipher yet...
http://www.bmw-motorrad.nl/nl/nl/in...nl/nl/nl/bikes/tour/r1200rt/r1200rt_main.html
http://www.bmw-motorrad.nl/nl/nl/in...nl/nl/nl/bikes/tour/r1200rt/r1200rt_main.html