Alfa Romeo A75 Turbo group A (1986)
 Source |
Development chain 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 |
A75 2,0 Super: A5326, from 1/2/1987 to 31/12/1999
| Group/Class | A/8 | Homologation number: A5307 | ||
| Years active | 1987 | Homologation start: 1/8/1986 Homologation end: 31/12/1999 |
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| 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 |
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| 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 |
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| 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 |
elec trical | ||||||||||||||
| Gabriele Noberasco Massimiliano Cerrai |
half shaft | ||||||||||||||
| Gianluigi Serena Antonino Marino |
dnf* | ||||||||||||||
| Statistics | |||||||||||||||
| Starts/finishes | 3/0 | 1/0 | 2/0 | ||||||||||||
*Group N4 entries
Article for production and group N
Click here
Drawings
Source
Garret T3
Source
SourceFigura 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
Source
page revision: 124, last edited: 18 Dec 2019 11:54