View Single Post
      01-05-2013, 09:27 PM   #57

Drives: 2012 335i
Join Date: Apr 2012
Location: *

iTrader: (0)

Originally Posted by S-Dot View Post
So basically as soon as it detects understeer, it diverts power (up to 100%) to the rear axle, and the resultant behaviour is thus quite similar to the RWD.
Not really.

The marketing sources you cite are describing what the car does when the tires are actually slipping on the pavement from too much power. This has nothing to do with the fundamental handling balance of the car; any car will exhibit understeer or oversteer if the limits if adhesion are exceeded on that end of the car.

Front wheel drive cars exhibit tremendous understeer as a fundamental handling characteristic, as well as torque steer upon throttle application. This does not mean the front wheels are spinning. AWD cars exhibit precisely the same characteristics of a FWD car to the extent the front wheels are powering the car.

Also, keep in mind the front wheel slipping under power understeer being addressed by xDrive is directly caused by the xDrive system itself! This form of understeer will never occur with RWD so there is nothing to "fix.". This is yet another example of xDrive understeer.

Last edited by Elk; 01-05-2013 at 10:19 PM.