Quote:
Originally Posted by RichardP
The X6M uses the S63B440O, the M5/M6 use the S63B44T0. There are quite a lot of differences, compression ratio is higher for the latter and the DME is different.
Interestingly the US supplied S63TU engine manual ( http://f10.m5post.com/forums/attachm...8&d=1360771557, page 3, full load diagram) quotes the output of the S63TU as 560hp/412kW. |
You are right and the big difference between them is VALVETRONIC
I know BMW did the same thing with 6 series (N63 and N63tu) to increase 45 HP and replaced the engine in 2013 models... I expected they do the same thing for 2015 model of X6M since the original S63 was modified for M5/M6 , but looks like they didn't