alfa-romeo (English, Русский)

155 Q4(Edit)

Central epicyclic unit with Ferguson viscous coupling, Torsen rear differential Source

Figure: Alfa-Romeo 155 Q4
alfa-155

Figure: Alfa-Romeo 155 Q4 front differential with epicyclic torque distributor and Ferguson VC
155Q4-Front-Diff

Figure: Alfa-Romeo 155 Q4 rear differential
155Q4-Rear-Diff

Figure: alfa romeo 155
alfa-romeo-155

Also see Lancia Dedra/Fiat Tempra.

Have you seen a better description of Alfa-Romeo 155 Q4 on the web? Please send us the link to or post it in a comment below!

155 V6 TI (DTM racecar)(Edit)

1993 version:

  • Front and rear: ZF plate-type limited slip differential
  • Center: epicyclic unit with Ferguson viscous coupling (distribution F/R 33/67)

Figure: 155 V6 TI 1993
alfa-romeo-155-dtm-2

1995 version:

Figure: 155 V6 TI 1995
alfa-romeo-155-dtm-1

Figure: 155 V6 TI 1995
alfa-romeo-155-dtm-3

Have you seen a better description of Alfa-Romeo 155 V6 Ti (Dtm Racecar) in a paper magazine? Can you please scan it or take a photo and send it to ?

156 Q4 (2003-2007)(Edit)

Full-time all wheel drive system with centre Torsen C (T3) differential.

Source (Italian)

Torsen? Source

AWD system available only with the 1.9 diesel engine JTDm 16v (110kW).

Do you think this information about Alfa-Romeo 156 Q4 (2003-2007) is incomplete? Please send us what you know to or leave a comment below.

159, Brera, Spider Q4 (2005-2011)(Edit)

AWD system: "Q4"

Full-time all wheel drive system with centre Torsen C differential ("Torsen T3 Twin diff").

Source

Distribution: 57% rear, 43% front.

Integrated with ASR and VDC (ESP by Alfa Romeo).

Source

Probably the same Q4 version of Alfa Romeo 156 Crosswagon.

AWD system available only with these "Q4" models:

3.2 petrol engine JTS V6 24v 191kW years 2005->2009 Automatic / Manual Transmission

2.4 diesel engine JTDm 20v 154kW years 2007->2009 Automatic / Manual Transmission

?Torsen Source?

Do you think this information about Alfa-Romeo 159, Brera, Spider Q4 (2005-2011) is incorrect? Please send us what you know to or leave a comment below.

164 Q4(Edit)

Asymmetric full-time all wheel drive with electronically-controlled center differential lock.

The "Viscomatic" unit - central viscous coupling locking epicyclic unit located near the rear axle and Torsen rear differential (prove?).

The Viscomatic was developed by Alfa-Romeo in collaboration with Steyr-Puch. This is a further evolution of the device that was previously used on the Proteo.[1]

Source

Figure: alfa romeo 164 q4 transmission
alfa-romeo-164-q4-transmission

Figure: Alfa-Romeo 164 q4 rear differential housing with Viscomatic central differential unit.
alfa-164-q4-viscomatic_x

Figure: alfa 164 q4 viscomatic
alfa-164-q4-viscomatic_xxx

Figure: Gearbox with power takeoff to the rear wheels
alfa-164-q4-viscomatic_xx

Figure: All wheel drive control diagram
alfa-164-q4-viscomatic

AWD system available only with the 3.0 V6 gasoline engine.

Do you think this information about Alfa-Romeo 164 Q4 is incorrect? Please send us what you know to or leave a comment below.

33 4x4 (1983-1991)(Edit)

Part-time all wheel drive.

The 33 4x4 made its debut in 1983. The layout adopted for this compact saloon meant that the rear wheel drive had to be engaged by means of a lever in the passenger compartment. It also offered higher ground clearance than front wheel drive cars.

In 1990 the 33 4x4 was fitted with an electromagnetic coupling who disengaged the rear axle during safety braking to avoid interferences with the ABS system. The lever was replaced by an electric switch.

Have you seen a better description of Alfa-Romeo 33 4X4 (1983-1991) in a paper magazine? Can you please scan it or take a photo and send it to ?

33 Permanent 4 / Q4 (1991-1995)(Edit)

Full-time all wheel drive.

In 1991, the Alfa 33 was fitted with a sportier interpretation of the four wheel drive concept. The transmission layout of the new Permanent 4 (this was the name of the version) was more complex than its predecessor: drive is transmitted to the viscous coupling from an electromagnetic coupling normally engaged and controlled by an electronic control unit which automatically disengages during high decelerations (safety braking).

In 1994 the car was renamed 33 Q4.

Figure: Alfa Romeo 33 Permanent 4
alfa-romeo-33-4x4-transmission

Figure: Alfa Romeo 33 Permanent 4
alfa-romeo-33-Q4-transmission_x

Figure: Alfa Romeo 33 Permanent 4 viscous coupling
alfa-romeo-33-4x4-ferguson-coupling

Figure: Alfa Romeo 33 Permanent 4
alfa-romeo-33-4x4-logo

Figure: Alfa Romeo 33 Permanent 4 transmission
alfa-romeo-33-Q4-transmission_xx

Figure: Alfa Romeo 33 Permanent 4 - Safety braking system
alfa-romeo-33-Q4-transmission

Source

Do you think this information about Alfa-Romeo 33 Permanent 4 / Q4 (1991-1995) is incorrect? Please send us what you know to or leave a comment below.

Matta AR51 (1951)(Edit)

First Alfa Romeo to feature 4WD.

Figure: alfa romeo matta ar51
alfa-romeo-matta-ar51

Do you own Alfa-Romeo Matta Ar51 (1951)? Can you please make a photo of the car's 4x4 transmission, switches, dashboard lights, etc. and send it to ?

http://www.alfaromeopress.com/press/detail/6796

Do you own Alfa-Romeo Links? Can you please make a photo of the car's 4x4 transmission, switches, dashboard lights, etc. and send it to ?

Footnotes


  1. http://stilealfaromeo.forumfree.it/?t=39435683

There are 2 comments
George
January 11, 2010 - 00:44

Don't forget the 'Q4' Alfa-Romeo models.
Torsen 3 [or 'C' if you like] center differential.

Reply to George
piggiu
September 04, 2012 - 14:40

Alfa Romeo 159 Q4 technology :
www.youtube.com

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