Originally Posted by
rage2
The 53's were the first "fat" cars. Basically the jump from E43 (V6 non hybrid) to E53 (I6 Hybrid) saw the weight jump 200 lbs from 4150lbs to 4350lbs due to hybrid pieces in the drivetrain. My E53 cab is an even bigger pig, at 4550lbs. The new E53 shouldn't jump much more in weight in comparison to the car it replaces as its carryover drivetrain.
That said, I don't track my cars anymore. 4600lb pig is perfectly fine for the street. I'll still pull >1g in corners in the summer using PS4S tires. Really, the downside to the weight would mostly be in consumables such as tires and brakes, although I have noticed brakes to last longer because of mild hybrid.
The real big pigs will be the 63's, adding a whopping 650lbs with the E performance drivetrain which will bring the E63 to around 5000lbs. That F1 battery, motor and turbo weighs a lot. Will it be a pig to drive? On the track, it'll suck 100%. Can't hide that weight. As a street car? I think it'll be just fine flying through on and off ramps. Just be prepared to buy a lot of tires. Brakes should be OK, the E performance platform will rarely use physical brakes as it can harvest energy from the majority of street braking.
TL;DR - these cars are all too heavy and be shitty on the track. They'll be just fine and fun to drive on the street.
edit - everyone is going down this path. The new M5 hybrid is also going to be a pig at 5400lbs. Lots of options out there coming down the pipe.