Alfa Romeo A75 Turbo group A (1986)
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1986: Alfa Romeo A75 Turbo
1988: Alfa Romeo A75 V6 3.0

Alfa 75 Turbo Evoluzion registry

Specifications

Year Model Chassis Engine Chassis numbers Units
1986 75 Turbo Typ 162 B1C 06134 ZAR162B10*00050011 - 00054249 4238
1987 75 Turbo Typ 162 B1C 06134 ZAR162B10*00054250 - 00055800 1550
1987 75 Turbo America Typ 162 B1D 06134 ZAR162B10*00060011 - 00061600 1589
1987 75 Turbo Evoluzione Typ 162 B1E 06158 ZAR162B10*00059001 - 00059510 510
1988 75 Turbo America Typ 162 B1G 06134 ZAR162B10*00061601 - 00063300 1699
1990 75 Turbo QV Typ 162 B1M 61203

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Group/Class A/8 Homologation number: A5307
Years active 1987 Homologation start: 1/8/1986
Homologation end: 31/12/1999
Engine
Type Alfa Romeo 06134, straight 4 cyl, 4 stroke, petrol engine located front longitudinal
Capacity 1779.4 cc WRC: x 1.4 = 2492 cc
1988: x 1.7 = 3025 cc
Bore x Stroke (mm) 80.0 x 88.5
Compression ratio 7.5:1
Output power - torgue 240 HP / 7900 rpm 28.5 kgm (280 Nm) / 4600 rpm
Main bearings forged steel crankshaft with 5 main bearings 60mm diameter, big end journals diameter 50mm connecting rod length between centers 157mm, big end bearing tunnel diameter 53.7mm, alumium alloy piston with 41.5mm compression height
Materials block: aluminium alloy with steel "wet" cylinder liners cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers, 111.8mm height
Cams/valves dual overhead camshafts (DOHC), chain driven 2 valves/cyl. - 8 valves total. 41.1mm (1987: 41.9mm) inlet valve diameter, 37.1mm exhaust valve diameter. 80o angle between inlet valve axis and exhaust valve axis
Aspiration Garrett T3 turbocharger (11 blades, steel turbine 48.4/58.5mm in/out diameter, 12 blades aluminium compressor 40.6/60mm in/out diameter) with air/air intercooler. Bosch L-jetronic multipoint electronic fuel injection pressure: 1.5 bar
Ignition electronic, firing order 1-3-4-2
Cooling system jacketed watercooled with pump, radiator, 7 blades-370mm diameter fan and thermostat 8.5 lt
Lubrication system wet sump 6 lt
Transmission
Type rear wheel drive 5 speed manual gearbox located in front of rear differential
Gearbox ratios 1st: 2.875/1 (46/16)
2nd: 1.720/1 (43/25)
3rd: 1.226/1 (38/31)
4th: 0.946/1 (35/37)
5th: 0.780/1 (32/41)
R: 3.000/1 (36/12)
dog, 1st: 2.133/1 (32/15)
2nd: 1.473/1 (28/19)
3rd: 1.136/1 (25/22)
4th: 0.923/1 (24/26)
5th: 0.821/1 (23/28)
R: 3.000/1 (36/12)
1988, dog: 1st: 2.571/1 (36/14)
2nd: 1.823/1 (31/17)
3rd: 1.409/1 (31/22)
4th: 1.148/1 (31/27)
5th: 1.000/1 (25/25)
R: 3.000/1 (36/12)
1991, dog: 1st: 3.077/1 (40/13)
2nd: 2.500/1 (35/14)
3rd: 1.941/1 (33/17)
4th: 1.526/1 (29/19)
5th: 1.286/1 (27/21)
6th: 1.087/1 (25/23)
R: 2.461/1 (32/13)
Diffrential ratio 3.909/1 (43/11), 4.444/1 (40/9), 4.111/1 (37/9), 3.777/1 (34/9), 3.454/1 (38/11), 4.777/1 (43/9), 5.111/1 (46/9), 5.444/1 (49/9), 4.750/1 (38/8), 5.125/1 (41/8), 5.500/1 (44/8), 4.100/1 (41/10), 3.545/1 (39/11), 3.076/1 (40/13).
1989: 3.363/1 (37/11), 3.900/1 (39/10), 3.250/1 (39/12), 3.181/1 (35/11)
1991: 2.818/1 (31/11), 2.727/1 (30/11), 3.272/1 (36/11), 2.750/1 (33/12), 2.833/1 (34/12), 2.916/1 (35/12)
hypoid spiral bevel gear limited slip rear differential
Clutch dry single disc 190mm diameter, 1991: 215mm diameter
Chassis-body
Type steel monocoque Alfa Romeo 162.B10 chassis, with 30kg aluminium AlZnMg 1F 35 (D38x5mm), or 22kg aluminium AlZnMg 1F 35 (D38x3.5mm), or 19.6kg steel 25CD4 (D40x2 and D35x2mm) or 27kg steel 25CD4 (D38x1.5mm) or 32kg steel 25CD4 (D38x2mm) roll-cage. 4 door steel saloon bodyshell with steed doors, steel front/rear bonnets and front/rear reinforced polyurethane bumpers.
1992: all aluminium roll cages are cancelled
Front suspension double wishbones with torsion bar and anti roll bar
Rear suspension watt's linkage with dedion axle, coil spring, anti roll bar
Steering system rack and pinion (no servo) 20.9/1 ratio. 1991: 11.8/1, 13.8/1 ratio
Brakes Front ventilated discs 270mm diameter with 2 aluminium piston calipers 48mm diameter. Rear solid discs 250mm diameter with 2 cast iron piston calipers 38mm diameter and located internally near rear differential (not in the wheel).
- Front ventilated discs 257mm diameter with 4 aluminium piston calipers 41.3mm diameter, rear ventilated discs 254mm diameter with 4 aluminium piston calipers 38mm diameter.
- Front ventilated discs 279mm diameter with 2 x 2 aluminium piston calipers 42mm diameter, rear ventilated discs 254mm diameter with 2 x 2 aluminium piston calipers 28mm diameter.
- Front ventilated discs 330mm diameter with 4 aluminium piston calipers 44.45mm diameter, rear ventilated discs 304mm diameter with 4 aluminium piston calipers 2x38.1+2x41.3mm pairs diameter.
- Front ventilated discs 320mm diameter with 4 aluminium piston calipers 2x36+2x40mm pairs diameter, rear ventilated discs 300mm diameter with 4 aluminium piston calipers 42mm diameter.
- Front ventilated discs 332mm diameter with 4 aluminium piston calipers 2x38+2x42mm pairs diameter, rear ventilated discs 305mm diameter with 4 aluminium piston calipers 2x36+2x40mm pairs diameter.
1987: front Girling ventilated discs 332/330mm diameter with 4 aluminium calipers 42.8mm diameter, rear Girling ventilated discs 280/304mm diameter with 4 aluminium calipers 2x38+2x33.9mm diameter.
- 1987: front Brembo ventilated discs 332mm diameter with 4 aluminium piston calipers 2x38+2x42mm pairs diameter, rear Brembo ventilated discs 278/280mm diameter with 4 aluminium piston calipers 2x36+2x40mm pairs diameter.
- 1987: front Lockheed ventilated discs 330mm diameter with 4 aluminium piston calipers 2x41.6+2x44.45mm pairs diameter, rear Lockheed ventilated discs 304mm diameter with 4 aluminium piston calipers 2x38.4+2x41.3mm pairs diameter.
- 1991: front/rear Brembo ventilated discs 355mm diameter with 4 aluminium piston calipers 2x38+2x44mm pairs diameter.
- 1991: front Brembo ventilated discs 332mm diameter with 4 aluminium piston calipers 2x38+2x44mm pairs diameter, rear Brembo ventilated discs 278mm diameter with 4 aluminium piston calipers 2x30+2x34mm pairs diameter.
dual circuit with Benditalia vacuum servo. 1991: water cooling for calipers with 8 lt water tank, front discs air cooling shield
Dimensions
length: 4.330 m (170.5") width: 1.678 m (66.1") height: 1.400 m (55.1")
wheelbase: 2.510 m (98.8") front track: 1.398 m (55") rear track: 1.388 m (54.6")
Rims - tires 6.5" x 14" - 15" 195/60 VR14
Weight 1080 kg
Fuel tank 70 lt
Drag coefficient 0.36

Results in WRC

Statistics

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 Total
Total WRC results
Races /wins 2 1 1 1 3 1 1 2 2 1 15
Entries/finishes 2/0 2/0 2/1 1/0 4/1 1/0 1/1 2/0 2/0 2/0 19/3 (15.8%)

Races

Works team: -

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN TdC GRE NZ ARG FIN (CdI) SR RAC (Oly)
Oğuz Gürsel
Nadir Ünal
dnf
Gabriele Noberasco
Massimiliano Cerrai
half shaft
Statistics
Starts/finishes 2/0 1/0 1/0

Article for production and group N

Click here

alsace88_loubet.jpg Source
Yves Loubet Rallye Alsace-Vosges 1988

Drawings

alfa_romeo_75_1989.jpg Source

Garret T3

Garrett_AiResearch_T3_Turbocharger.jpg Source
TBO3_CC.gif Source
Figura Referencia Descripción
1 400674-0812 Tornillo ( car. admisión )
2 410218-0001 Cierre ( car. admisión )
3 409589-0144 Caracol admisión m.
3 431901-0005 Caracol admisión
4 409248-0000 Junta ( car. admisión )
5 400677-0816 Tornillo ( car. escape )
7 408848-0003 Cierre ( car. escape )
8 444443-0001 Caracol escape
9 443989-0001 Tuerca eje / flecha
10 409096-0014 Rueda compresora
11 408049-0009 Segmento ( escape )
12 451311-0003 Turbina y eje / flecha
13 409639-0000 Plato calor
15 400674-0616 Tornillo ( plato )
16 430108-0003 Plato
17 400424-0000 Aro de goma
18 406907-0001 Cojinete empuje
20 409558-0000 Collarín
21 400568-0000 Anillo resorte ( cojinete )
22 410775-0001 Cojinete / Buje
24 430027-0050 Alojamiento cojinetes (bujes) / Cartucho
25 444441-0002 Alojamiento válvula
26 430819-0066 Válvula / Actuador
27 445215-0018 Seguro de válvula
29 210021 Junta salida aceite
30 413534-0001 Racor ( car. admisión )
38 400825-0820 Tornillo ( alj. válvula )
54 407516-0003 Espaciador

Limited slip differential

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