The M5 keeps its cool when you’re not
To maintain reliability, bits of the new M5 have also been upgraded and redesigned to keep cool. With around 700Nm of torque hammering the all-wheel drive system and eight-speed automatic, things are going to get very hot… So the engineers at M have design a special sump housing and larger pumps to stop fluid boiling.
Both the oil and water pump have been changed for higher capacity units, and they push the coolant and oil through revised capillaries. The all-wheel drive and transmission oils are also now run through a finned aluminium oil sump housing, unique to the new M5.
700Nm is weak compared to the Merc E63’s 850Nm from a smaller capacity V8. I thought it was going to be 750Nm, but still well down on the Merc.
It’s an impressive engine in the Mercedes. The M5 will be a fair bit lighter though (in the region of 150-200kg) and the new turbo design might bring more torque lower in the rev range. It’ll be a good battle no doubt. – Alex
If the new M5 is 100kg lighter than the old then it should be ~ 150kg lighter than the E63, but 1700kg would be impressive for such a loaded beast as the M5. I can’t beleive it would be even lighter in the 1650kg range, but that would be epically good. Buy a second hand one in 5 years when it down to about $70K
Yes, 150kg difference to the Merc. If BMW managed to put in an AWD system and drop 150kg from the previous M5, that would be very impressive. – Alex