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Originally Posted by Meatnog
The E90 has a 50/50 weight ratio. That means that 1/2 the weight of the car is in the front, half in the back. Ever wonder how they can POSSIBLY acheive that when the engine is in the front?
It is because from 1/2way up the car the frame goes from welded steel to bolted/glued aluminum.
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Sorry, but this is dead WRONG. The reason for the perfect 50/50 weight distribution is caused by a few engineering techniques: RWD, all the couplings are in the back in addition to the battery, this adds weight to the heinie. Also, the engine is mounted in such a way that very little of it pertrudes past the front wheels (axels), which is where the perfect distribution comes from. When a car isn't 50/50, it means that weight is either in front of the front wheels (akels) or behind the rear wheels (axels). It's all about the wheelbase and engine placement prettymuch. That's why you find so many FWD cars have poor weight distribution, all that transmission and engine is hard to keep from spilling out in front of the front wheels (axels).