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Discussion Starter #1
has bmw experience with aluminum on cars? so will be the new 5er series have a aluminum chassis? because new A6 getting a full-aluminium chassis. i hope that the next A6 wont be lighter than the New 5er series. so who is better on lightweight materials, audi or bmw? (aluminium, CFK, carbon..)
 

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BMW has saved over 40lbs on the f10 over the e60 with lighter aluminum on the already very light front suspension.
 

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Discussion Starter #3
i mean primary the chassis. has bmw experience with alu-chassis or something else? im looking for future, i will hope that bmw build in future the ever the lighter cars then audi. because audi would build the new A6 with a complete alu-chassis. i hope the next 5er is always lighter !
 

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The front end (frame) of the e60 is aluminum.
 
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