The 'lag free' power delivery perhaps (as mentioned in the release)??? Or did they talk about a 'lag free' engine in the X5 M press release as well???
Or maybe the different plumbing is just that: different. Because the engine bay of X5 is much bigger, there's some differences for the 5er engine bay...
Either way, only 5 hp extra is just awkward, considering the fact that they frequently said to expect more power than in X5 M....and then they come with the exact same torque figures and a measly 5 hp extra?? I mean seriously?!?!
Also, M5 is 1,0 second slower 0-200 than Panamera Turbo S ;/ Could be the RWD 0-100 time that's causing the difference?
It might be just the front bumper issue.. The x5/x6 M front bumper have more air intakes than the one on the M5 maybe the that's why it need more or bigger plumbing and cooling...