Audi’s Quattro all-wheel drive system is among the most well-known — if not the very most well-known — all-wheel drive system in the marketplace. Not solely that nevertheless it’s among the finest. It’s additionally fairly distinctive in its setup and appears to work flawlessly in almost all conditions. Nonetheless, that doesn’t imply it’s fully unflappable, as there are some (only a few) conditions the place it may be caught out. Although, even nonetheless, a Quattro-equipped Audi could make it via nearly something, as evidenced by this video of a first-gen Audi S3.
On this video, we get to see the Quattro system of a first-gen Audi S3 examined right down to particular person wheels. So it will get put via 5 totally different “four×four Intelligence” checks. The checks are carried out by inserting rollers beneath sure wheels, to take away their traction. It’s then timed to see how lengthy it takes for the Quattro all-wheel drive system to shunt energy to the wheels with traction on the bottom and pull/push the automobile off its rollers.
First, it begins off with simply its entrance wheels on rollers and it solely takes 2.19 seconds for the rear wheels to get sufficient energy to push the S3 off of its entrance rollers. The rollers are then put beneath the rear wheels and it solely takes 1.06 seconds for the fronts to tug it off (phrasing).
After that, subsequent checks put the rollers on simply the driver-side wheels, simply the passenger-side wheels after which on three of the 4 wheels. That final check tries to see if it will probably shunt sufficient energy to only one wheel (and a number of particular person wheels are examined for this) to get the automobile off of its rollers.
What’s fascinating about that is that the Audi S3 doesn’t use correct Quattro. The primary-gen S3, being based mostly on the MkIV Volkswagen Golf, makes use of a transverse engine setup with a Haldex-based all-wheel drive system. So it’s primarily front-wheel drive (therefore why the entrance wheels had been the quickest at pulling the automobile off its rollers) with a clutch pack that may distribute torque to the rear axle when wanted.
Correct Quattro makes use of a longitudinal engine format, with the engine and transmission in a straight line, and a middle crown Torsen (torque-sensing) differential mounted to the again of the transmission. Energy is shipped via the transmission into the Torsen diff. That diff then distributes energy to the entrance and rear driveshafts, to energy every axle. The torque cut up is 60/40, rear/entrance, beneath regular circumstances. However being a Torsen diff, when one axle slips, the diff sends energy to the opposite axle nearly instantaneously.
Nonetheless, despite the fact that the Audi S3 on this video makes use of a Haldex all-wheel drive setup, it really works fairly nicely and is able to sends a shocking quantity energy to even single wheels. So in case you have an all-wheel drive-equipped Audi (particularly correct Quattro), there’s a very good probability you’re not getting caught.
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