155 Q4
Central epicyclic unit, Ferguson viscous coupling and Torsen rear differential Source
Figure: Alfa-Romeo 155 Q4 (96KB)

Figure: Alfa-Romeo 155 Q4 front differential with epicyclic torque distributor and Ferguson VC (60KB)

Figure: Alfa-Romeo 155 Q4 rear differential (27KB)

Also see Lancia Dedra/Fiat Tempra.
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156 Crosswagon
Torsen? Source
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159
Torsen? Source
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164 q4
Central viscous coupling locking epicyclic unit located near the rear axle and Torsen rear differential (prove?).
Source
Figure: Alfa-Romeo 164 q4 rear differential housing with Viscomatic central differential unit. (62KB)

Figure: (69KB)

Figure: Gearbox with power takeoff to the rear wheels (102KB)

Figure: All wheel drive control diagram (74KB)

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Brera
Torsen? Source
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Spider Q4
Torsen? Source
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