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Senior Member
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Discussion Starter · #1 ·
Just curious about which is better. Read some info from Wiki -

http://en.wikipedia.org/wiki/Quattro_(all_wheel_drive_system)

So quattro is permanent 4 wheel drive where as haldex in the R32 is FWD but can divert 50% of the torque to the rear if the front looses traction. Why not just have a permanent 4wd system like quattro? Surely it doesnt save much fuel or weight to have the haldex system.

If anyone knows the answer or which is better would be good to hear your thoughts. I assume Subaru are permanent 4wd systems too?
 

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Senior Member
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842 Posts
permenant does away with the time needed to detect slip and transfer torque vie the haldex

doesn't really make a big difference as the S3, A3 and even the Veyron run Haldex!
 

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subarus arnt permenant 4wd either i beleive the main advantage to tempory 4wd systems like haldex is the ability to change the power bias ie sometimes 100% fwd sometimes 50/50 and sometimes anywhere in between ie 80/20 or 70/30 your not stuck with a set transfer %
 
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