Quote:
Originally Posted by XutvJet
Much of it has to do with the fact that the Audi has a lot more weight hanging out in front the front axle. It makes the car far more prone to understeer and less willing to rotate, especially considering that more Audis do not have a RWD biased AWD system.
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Actually they do have rear-biased for the most part. The information in that video is not quite accurate. All the current Audi models using the MLB platform (longitudinally mounted engines) with the exception of the latest Q5, A4 Allroad, and A4 manual transmissions, use a Torsen quattro system with a 40/60 front/rear torque distribution. Recently older versions of these same models all use the 40/60 split Torsen. The latest models I mentioned above use the newest quattro with Ultra electronically-controlled system. Note that all S and RS Audis on MLB use the Torsen as quattro with Ultra cannot be used on any car generating 369 lb. ft. (500 nm) of torque or higher.
The A3/S3/RS3 and TT variants (MQB platform with transverse-mounted engines) use a Haldex-based system.
It's under debate what the capabilities of the quattro with Ultra are. Audi has made claims it can direct 100% to the rear or front, but with their design, it seems difficult to believe that is the case. Those who have driven in one universally say they cannot distinguish between that system and the previous Torsen-based quattro, though, which is mechanically able to distribute torque up to 75% to the front wheels and 85% to the rear wheels.