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      02-22-2013, 01:57 PM   #38
ovekvam
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Drives: 2021 Galvanic Gold i3S
Join Date: Jun 2012
Location: Bryne, Norway

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Quote:
Originally Posted by Math View Post
I dont know about that, while the door may be more rigid with the frame, the F21 may be more rigid overall due to less openings in the whole bodywork.. Don't you think?
No, I don't think so. The B-pillar is further back in the F21. I have seen numbers for torsional rigidity for the E30 and E36 in 2 and 4 door versions. The E30 sedan is stiffer than the coupe, but the coupe is 20 kg lighter. In the E36, they added reinforcements to the coupe, so they have the same weight and rigidity between the coupe and sedan.

The F20/21 have the same weight, so I guess BMW is still adding extra reinforcements to the F21 to make up for the long doors.

The rear seats are quite imporant for overall rigidity. Selecting 40/20/40 foldable seats will hurt the rigidity somewhat.
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