Trying to revive this thread maybe we get someone who has more clue
I tried on my own to do some tests. Every time I used Kickdown (so the accelerator pedal is completely pressed).
Sport Mode - Gearbox D - Seems slower (maybe 252hp here)
Sport Mode - Gearbox S - Seems quicker for sure, revs are higher (thinking this may also set it for 292hp)
XtraBoost Mode - Gearbox D - Seems as Sport + S
XtraBoost Mode - Gearbox S - Can't seem to note the car to be quicker, but it does rev a bit more it seems.
Tried asking BMW, they sent me to the dealership. The dealership said it's only giving 292hp in XtraBoost mode, and none other. I tend to "feel" that Gearbox in S , even in Sport gets the whole 292hp. But I may also be way off.
I find it a bit frustrating that there is no clear information specified. I mean sure, the manual and also the onboard manual say something in that particular way, but it is way too vague for my taste.
