Alfa Romeo A75 V6 3.0 group A (1988)
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Home » Rally Cars » Alfa Romeo A75 V6 3.0
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1986: Alfa Romeo A75 Turbo
1988: Alfa Romeo A75 V6 3.0

Specifications

Group/Class A/8 Homologation number: A5350
Years active 1988 Homologation start: 1/2/1988
Homologation end: 31/12/1999
Engine
Type Alfa Romeo Busso, V6 cyl (60o), 4 stroke, petrol engine located front longitudinal
Capacity 2959 cc WRC: 2959 cc
Bore x Stroke (mm) 93.0 x 72.6
Compression ratio 9.5:1, 11.5:1
Output power - torgue
Main bearings forged steel crankshaft with 4 main bearings 60 mm diameter, big end journal diameter 52mm connecting rod length between centers 131 mm, big en bearing tunnel diameter 55.5 mm, aluminium alloy piston with 39.9mm compression height
Materials block: aluminium alloy, 268mm height cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers, 127mm height
Cams/valves single overhead camshaft (SOHC) in each side. 2 total 2 valves/cyl. - 12 valves total, 44mm inlet valve diameter, 38.6mm exhaust valve diameter. 47o angle between inlet valve axis and exhaust valve axis
Aspiration natural, Bosch L-jetronic multipoint electronic fuel injection
Ignition electronic, firing order 1-4-2-5-3-6
Cooling system jacketed watercooled with pump, radiator, 6 blades-360mm diameter fan and thermostat 12 lt
Lubrication system wet sump 7.5 lt
Transmission
Type rear wheel drive 5 speed manual gearbox located infront 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)
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)
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)
Diffrential ratio 3.545/1 (39/11), 4.750/1 (38/8), 5.125/1 (41/8), 5.375/1 (43/8), 5.500/1 (44/8), 3.777/1 (34/9), 4.111/1 (37/9), 4.444/1 (40/9), 4.555/1 (41/9), 4.777/1 (43/9), 5.111/1 (46/9), 5.444/1 (49/9), 4.100/1 (41/10), 4.300/1 (43/10), 3.454/1 (38/11), 3.545/1 (39/11), 3.818/1 (42/11), 3.909/1 (43/11), 3.416/1 (41/12), 3.076/1 (40/13) hypoid spiral bevel gear limited slip rear differential
Clutch dry single disc 215mm diameter
Chassis-body
Type steel monocoque Alfa Romeo 162.B60 chassis with 32kg steel 25CD4 (D38x2mm), or 40kg steel 25CD4 (D38x1.5mm) roll-cage. 4 door steel saloon 161.33 and 161.33.2 bodyshell with steed doors, steel front/rear bonnets and front/rear reinforced polyurethane bumpers
Front suspension double wishbones with torsion bar and anti roll bar
Rear suspension watt's linkage with de-dion axle, coil spring, anti roll bar
Steering system rack and pinion with hydraulic power assistance 20.9/1, 14.6/1 to 27.2/1 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 332mm diameter with 4 aluminium piston calipers 2x42+2x38mm pairs diameter, 320mm diameter with 4 aluminium piston calipers 2x40+2x36mm pairs diameter, 257mm diameter with 4 aluminium piston calipers 41.3mm diameter, 279mm diameter with 4 aluminium piston calipers 38mm diameter.
Rear: ventilated discs 300mm diameter with 4 aluminium piston calipers 42mm diameter, 278/280mm diameter with 4 aluminium piston calipers 2x40+2x36mm pairs diameter, 254mm diameter with 4 aluminium piston calipers 38mm diameter
dual circuit with Benditalia vacuum servo
Dimensions
length: 4.420 m (174 in) width: 1.678 m (66.1 in) height: 1.350 m (53.1 in)
wheelbase: 2.510 m (98.8 in) front track: 1.396 m (55 in) rear track: 1.382 m (54.4 in)
Rims - tires 6.5 x 14" or 15"
Weight 1150 kg 55% - 45% distribution front/rear
Fuel tank 70 lt
Drag coefficient 0.34

Results in WRC

Races

Works team: -

Season
Entry Rally event
Driver
Codriver
Team M.C
Entry list
SVE
Entry list
POR KEN TdC GRE Oly (N.Z) ARG FIN (CdI) S.R RAC
Paul Rouby
Jean-Louis Martin
8th
Jacques Panciatici
Philippe David
Gema Racing eng ine
Gabriele Noberasco
Massimiliano Cerrai
acci dent
Total points
()
3 3
Statistics
Others starts/finishes 3/1 2/1 1/0

Article for production

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16+TdC88Rouby2.jpg Source
Paul Rouby in Tour de Corse '88

Drawings

alfa_romeo_75_1989.jpg Source
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