Audi 80/90 quattro, Audi Quattro, Audi UrQuattro 1981-1987
First quattro evolution. Full-time all wheel drive with free differentials. Manually locking (by 2 rotating switches on the console) rear and center differentials.
Figure: Audi 80 B3 quattro (60KB)
Figure: Audi 100 C3(?) quattro (78KB)
Figure: Audi Quattro (91KB)
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Figure: quattro I transmission. On the top picture: center differential (5), center differential locking fork shaft (6), differential locking actuator (7) (133KB)
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Figure: Audi 100 quattro rear differential (38KB)
Figure: Audi 100 quattro rear differential locking mechanism (arrow) (46KB)
Figure: Audi 100 quattro center differential locking mechanism (42KB)
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Audi 80/90/100/200/S4 quattro 1987-1994
quattro II. Full-time all wheel drive. Torsen center differential with automatic distribution of torque between front and rear axles. Manually activated (electro-pneumatic system) rear locking differential which automatically unlocks when speed exceeds 25 km/h.
Figure: Audi 80 B4 quattro (207KB)
Figure: quattro II transmission with Torsen center differential (50KB)
Figure: Audi 100 rear differential and differential lock fork(13) (10KB)
Figure: Audi 100 rear differential locking vacuum pipes (87KB)
Figure: Audi 80/100/90/200/a4/a6/s4/s6 transmission. 1 - Torsen center differential; 2 - Rear driveshaft output; 3 - Front differential; 4 - Engine input (143KB)
You have better pictures or videos of Audi 80/90/100/200/s4 Quattro 1987-1994 that you can contribute? Please send them to ! Audi V8 Automatic 1988-1994
quattro III - Full-time all wheel drive. Torque distribution via electronically controlled multi-plate hydraulic transfer clutch in the center. Torsen differential in the rear axle. Quattro was for the first time used with automatic transmission. The gearbox was the source for high pressure oil, that was used to activate the clutch.
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quattro IV - Full-time all wheel drive. Torsen center differential. Electronic traction control (EDL) on front and rear axles that applies brakes to spinning wheels, which has effect of locking front and rear differentials. Works at speeds up to 40 kph (25mph). On more powerful versions S4/S6 - up to 80 kph (50mph). A8 uses EDL and ASR, which reduces engine output. It is almost impossible to lose traction with this system under any circumstances, except if one of the axles is raised in the air. Audi Allroad can feature low gearing (optional).
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Figure: Audi A4 B6 quattro (86KB)
Do you own Audi A4/a6(C4)/a6(C5)/a8/s4/s6/allroad Quattro 1994-2007, S4/s6 Quattro 1994-2005? Can you please make a photo of the car's 4x4 transmission, switches, dashboard lights, etc. and send it to ? Audi RS4 B7 manual/Q7 2005-..., S4 B7 manual 2006-..., A5 2006-..., A6 2006-...(verify), all A4 B8 2007-...
quattro V. Full-time all wheel drive. Torsen type III planetary type differential with a 40/60 front/rear split for improved handling.
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quattro VI. Full-time all wheel drive. Crown gear differential with a 40/60 front/rear split.
Do you own Audi Rs5 (2011-...)? Can you please make a photo of the car's 4x4 transmission, switches, dashboard lights, etc. and send it to ? Audi A3/S3 quattro (1998-2003)
Haldex Generation I automatic all wheel drive system - electronically controlled Haldex multi-plate hydraulic clutch, located near the rear differential. Normally front wheel drive vehicle. It detects the need of all wheel drive at 1/8 of the wheel spin and transfers up to 100% of torque to the rear axle.
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Haldex Generation II automatic all wheel drive.
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Haldex Generation IV automatic all wheel drive.
Figure: Audi TT quattro with Haldex Generation IV(?????) (171KB)
Have you seen a better description of Audi Tt Quattro (2009-...) on the web? Please send us the link to or post it in a comment below! Audi R8
Normally rear wheel drive vehicle. Front alxle is driven via a viscous coupling that is installed in the front axle housing. 15% of torque is transferred to the front axle in normal conditons, and up to 30% when rear wheels slip.
Figure: Audi R8 (125KB)
Figure: Audi R8 (54KB)
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