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Originally Posted by mkoesel
I think that’s a terrible basis for comparison because the extra weight from the additional two cylinders dwarfs the extra weight from the mild hybrid system. Now add in the second turbocharger the S58 has and its plumbing and you have easily caught up to the mild hybrid-equipped B58. Furthermore, most M4s are likely to be AWD since the traction benefit, particularly from a dig, will be very compelling. If it weren’t the case, they’d not be bothering with the feature.
How does the weight of the G22 M440i xDrive compare to that of the F32 440i sDrive? That's likely the more telling number when it comes to how much weight gain the typical M4 will see. Of course the RWD 6MT M4 will be significantly lighter than an AWD 8AT M4, so that's not to be overlooked either.
Another data point: the X3 M and X4 M outweigh their X3 M40i and X4 M40i counterparts by a couple hundred pounds or more. Now, one could also point out that the M5 and M8 weigh less than the M550i and M850i respectively. However, the X5 M and X6 M also weigh less than the X5 M50i and X6 M50i. So the lighter weights of the M models would appear to be due to some effort M Division has put into the larger more premium iteration of the CLAR matrix or perhaps the weight of the S63 as compared to the N63. In other words the advantage is not that the M5/M8 are cars whereas the X3/X4 M are SUVs because it also applies to the X5/X6 M.
Irrespective of all of the above, the M440i xDrive weighs just a touch under 4000 pounds and is less than three inches shorter than an 840i Coupe. Frankly, it’s scary heavy and shockingly large. That’s my honest feedback, not trying to rain on your parade.
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No worries, I asked for your thoughts. What good would it be if you weren’t giving your honest input and instead just agreed with mine?
Reading your comment I still guess that the G82 M4 RWD’s weight could be close to the F82 based on what I posted above IF it skips the mild hybrid system. The M-Xdrive will of course have a weight penalty.
BMW managed to make the lightest F82 only 50 lbs heavier than the F32 430i (listed weight) added cylinder counts and all. I don’t see a good technical reason in your thoughts why they can’t or will not do it again. One technical aspect of interest is the weight of the S58 vs the S55, would you know?
I see that the new 4 series platform G22 seems to have gained only 4 lbs on the old 4 series the F32 in an as close to apples to apples comparison as we can get from the released models as impressive and a good sign.