Audi 90 B3 Quattro group A (1988)
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Home » Rally Cars » Audi 90 B3 Quattro
89-90.jpg Source Development chain
1983: Audi 80 B2 Quattro
1985: Audi 90 B2 Quattro
1988: Audi 90 B3 Quattro

Specifications

Group/Class A/8 Homologation number: A5346
Years active 1988 - 1990 Homologation start: 1/1/1988
Homologation end: 31/12/1996
Engine
Type NG, straight 5cyl, 4 stroke, petrol engine located front longitudinal with 27.2o right inclination (to co drivers side-LHD)
Capacity 2309.3 cc WRC: 2309.3 cc
Bore x Stroke (mm) 82.5 x 86.4
Compression ratio 12.0:1
Output power - torgue 195 HP / 6500 rpm 24.5 kgm (240 Nm) / 5250 rpm
Main bearings forged steel crankshaft with 6 main bearings 58mm diameter, big end journals diameter 47.8mm connecting rod length between centers 144mm, big end bearing diameter 50.6mm, aluminium alloy piston with 33.3mm compression height
Materials block: cast iron, 277.8mm height, 88mm bore spacing, 220mm deck height cylinderhead: reverse flow aluminium alloy with box shaped combustion chambers, 132.9mm height
Cams/valves 1 overhead camshaft (SOHC), belt driven 2 valves/cyl. - 10 valves total. 40mm inlet valve diameter, 33mm exhaust valve diameter. 0o angle between inlet valve and vertical, 0o angle between exhaust valve and vertical. 2 coil springs per valve
Aspiration natural, Bosch KE-jetronic multipoint mechanical/electronic fuel injection
Ignition electronic, firing order 1-2-4-5-3
Cooling system jacketed watercooled with pump, radiator, 5 blades-305mm diameter fan and thermostat 8 lt
Lubrication system wet sump 4 lt
Transmission
Type four wheel drive 5 speed manual gearbox
Gearbox ratios 1st: 3.545/1 (39/11)
2nd: 2.105/1 (40/19)
3rd: 1.300/1 (39/30)
4th: 0.942/1 (33/35)
5th: 0.769/1 (30/39)
R: 3.500/1 (35/10)		 1st: 3.111/1 (28/9)
2nd: 2.273/1 (25/11)
3rd: 1.706/1 (29/17)
4th: 1.318/1 (29/22)
5th: 1.125/1 (27/24)
or 5th: 1.040/1 (26/25)
R: 3.500/1 (42/12)
Diffrential ratio front and rear: 4.111/1 (37/9), 4.142/1 (29/7), 4.125/1 (33/8), 4.222/1 (38/9), 4.555/1 (41/9), 4.571/1 (32/7), 4.625/1 (37/8), 4.857/1 (34/7), 4.875/1 (39/8), 5.125/1 (41/8), 5.142/1 (36/7), 5.250/1 (42/8), 5.285/1 (37/7) output from gearbox hollow secondary shaft to 1:1 torsen center differential with two outputs, 1st to hypoid spiral bevel gear limited slip front differential homocentrically through secondary hollow shaft of gearbox, 2nd to hypoid spiral bevel gear limited slip rear differential
Clutch dry, single disc 228mm diameter
Chassis
Type steel monocoque Audi Typ 89Q chassis version of VW B3 platform with 32kg 25CrMo4 steel (D40x1.5 and D40x1mm) roll-cage. Front and rear steel subframes. 4 door saloon steel/aluminium/plastic bodyshell with steel front/rear bonnets, steel/aluminium doors, EMPP polypropylene front/rear bumpers
Front suspension Mac pherson strut with lower "A" wishbone, coil spring, telescopic gas shock absorber and antiroll bar
Rear suspension Mac pherson strut with lower "A" wishbone, coil spring, telescopic gas shock absorber and antiroll bar
Steering system rack and pinion with hydraulic power assistance 3.2 turns lock to lock. 16.8/1, 13.4/1 ratio
Brakes front ventilated discs 256mm diameter with 1 GGG cast iron piston caliper 54mm diameter, rear solid discs 245mm diameter with 1 GGG cast iron piston caliper Teves 36/ Girling 38mm diameter,
Front veltilated discs 304mm diameter with 4 Alcon aluminium piston calipers 34.9mm diameter, rear ventilated discs 280mm disk diameter with 4 Alcon aluminium piston calipers 31/38/41.3mm diameter.
Front veltilated discs 280/295mm diameter with 4 AP aluminium piston calipers 31/38/41.3mm diameter, rear ventilated discs 280mm disk diameter with 4 AP aluminium piston calipers 31/38/41.3mm diameter.
Front veltilated discs 304mm diameter with 4 AP aluminium piston calipers 38/41.3mm diameter, rear ventilated discs 304mm disk diameter with 4 AP aluminium piston calipers 31/38/41.3mm diameter.
1990: Front veltilated discs 295mm diameter with 4 AP aluminium piston calipers 31/38/41.3mm diameter, rear ventilated discs 295mm disk diameter with 4 AP aluminium piston calipers 31/38/41.3mm diameter.		 dual circuit with servo, adjustable ratio split front to rear, stone protection shields for front/rear discs
Dimensions
length: 4.394 m (173.0 in) width: 1.704 m (67.1 in) height: 1.397 m (55.0 in)
wheelbase: 2.537 m (99.9 in) front track: 1.417 m (55.8 in) rear track: 1.426 m (56.1 in)
Rims - tires 6" - 7" x 14 - 15"
Weight 1150 kg front/rear: 66% - 34%
Weight/power 5.9 kg/HP
Fuel tank 70 - 80 lt

Results in WRC

Statistics

1988 1989 1990 1991 1992 1993 1994 1995 Total
Total WRC results
Races 3 11 10 4 5 3 1 1 38
Entries/finishes 3/2 21/9 18/11 9/5 8/5 5/4 1/1 1/1 66/38 (57.6%)
Total points 9 10 24 15 18 1 3 80
(2.105 per race)
(1.250 per entry)

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
Rudi Stohl
Ernst Röhringer		 4th
Lasse Gundler
Johnny Johansson		 Team V.A.G Sverige dnf
Paola De Martini
Umberta Gibellini		 Audi Sport Europa Team 9th
Flaminio Martino
Marcella Balestrieri		 dnf
Kari Kivenne
Timo Kivenne		 dnf
Total points
()		 9 7 2
Statistics
Starts/finishes 4/2 1/1 1/0 1/1 1/0
sx1.jpg
Rudi Stohl in Acropolis '89
AUDI+80+QUATTRO.jpg Source

Article from 4T 228, 9/1989

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Drawings

audi-90-1988.gif Source
audi_90_quattro_20v_1989-44497.jpg Source
audi-80_x.jpg Source

Transmission

audi-quattro-II_x.jpg Source
page revision: 95, last edited: 19 Sep 2019 20:58
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