Audi 80/90 B2/B3 quattro, Audi Quattro, Audi UrQuattro 1981-1987Next
First quattro evolution. Full-time all wheel drive with free differential. Manually locking, pneumatically-activated (by 2 rotating switches, or by a pull knob on the console) rear and center differential.
Figure: Audi 80 B3 quattro (60KB)
Figure: Audi 100 C3(?) quattro (78KB)
Figure: Audi Quattro (91KB)
Figure: quattro I transmission. On the top picture: center differential (5), center differential locking fork shaft (6), differential locking actuator (7) (133KB)
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(B3/B4)/100/200/S2/S4 quattro 1987-1994, RS2 1994-1995Next
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: Audi 200 C3 quattro (337KB)
Figure: Audi 100 C4 quattro (337KB)
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 (121KB)
Audi 80 B3:
Audi 80 B4:
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Audi V8 Automatic 1988-1994Next
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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Audi A4/A6(C4)/A6(C5)/A8/S4/S6/Allroad quattro 1994-2007, S4/S6 quattro 1994-2005Next
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 differential. 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 range (optional).
Figure: Audi A4 B6 quattro (86KB)
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Audi RS4 B7 manual/Q7 2005-..., S4 B7 manual 2006-..., A5 2006-..., A6 2006-...(verify), all A4 B8 2007-..., RS6 2008-...Next
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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Audi A4 B9 quattro (2014-...), A5 quattro (2016-...)Next
quattro VII. Automatic all wheel drive allegedly called e-quattro. The e-quattro system would allegedly use a pair of electric motors with a combined output of 136 horsepower to drive the rear wheels, while the internal-combustion engine would supply power to the front wheels only.
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Audi A3/S3 quattro (1998-2003)Next
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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