Audi Quattro A1 group B (1983)
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Home » Rally Cars » Audi Quattro A1
12201-audi-quattro.jpg Source Development chain:
1981: Audi Quattro
1983: Audi Quattro A1
1983: Audi Quattro A2
1984: Audi Sport Quattro
1985: Audi Sport Quattro S1
1987: Audi Sport Quattro S2

In rallies: see video
Street version information here

Specifications

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Group/Class B/12 Homologation number: B229 (07/01 ET)
Years active 1983 Homologation start: 1/1/1983
Homologation end: 31/12/1988
Engine
Type Audi R5T GV/WR, straight 5 cyl, 4 stroke, pertol engine located front longitudinal with 27.5o inclination to co-drivers side (LHD)
Capacity 2145 cc WRC: x 1.4 = 3003 cc
1988: x 1.7 = 3646.5 cc
Bore x Stroke (mm) 79.51 x 86.4
Compression ratio 6.3:1
Output power - torgue 320 - 340 HP / 6500 rpm 42.0 kgm (412 Nm) / 3500 rpm
Main bearings die-forged steel crankshaft with 6 main bearings 54mm diameter, big end journal diameter 46mm forged steel connecting rod length center to center 136mm, big end bearing tunnel diameter 49mm, aluminium alloy piston
Materials block: aluminium alloy with GG cast iron cylinder liners cylinderhead: reverse flow cast aluminium alloy with hemispherical combustion chambers and vertical valves
Cams/valves 1 overhead camshaft (SOHC), belt driven 2 valves/cyl. - 10 valves total. 41.1mm inlet valve diameter, 35.2mm exhaust valve diameter. 0o angle between inlet valve axis and vertical, 0o angle between inlet valve axis and vertical
Aspiration KKK K27 turbocharger (12 blades nickel alloy turbine 64/76.2mm in/out diameter, 12 blades aluminium compressor 52.5/82mm in/out diameter) with air/air intercooler, with Pierburg/Bosch Sport multi point electronic hydraulic fuel injection pressure: 0.8 - 1.9 bar
Ignition electronic, firing order 1-2-4-5-3
Cooling system jacketed watercooled with pump, radiator, fan and thermostat
Lubrication system dry sump with 1 oil cooler 12 lt
Transmission
Type four wheel drive 5 speed manual gearbox
Gearbox ratios 1st: 3.600/1 (36/10)
2nd: 2.188/1 (35/16)
3rd: 1.360/1 (34/25)
4th: 0.967/1 (29/30)
5th: 0.778/1 (28/36)
R: 3.500/1 (42/12)
1st: 3.000/1 (27/9)
2nd: 2.000/1 (24/12)
3rd: 1.500/1 (27/18)
4th: 1.217/1 (28/23)
5th: 1.042/1 (25/24)
R: 3.500/1 (42/12)
Diffrential ratio front and rear, 4.375/1 (35/8), 4.571/1 (32/7), 4.625/1 (37/8) output from gearbox secondary axis to open or locked or limited slip center differential with two outputs, 1st to hypoid spiral bevel gear, open front differential homocentrically through secondary hollow shaft of gearbox, 2nd to hypoid spiral bevel gear, 75% limited slip rear differential
Clutch Fichtel & Sachs dry, single disk, 240mm diameter
Chassis-body
Type steel monocoque Typ 85 chassis version of VW B2 platform with roll-cage. Front steel subframe. 2 door coupe steel bodyshell with plastic bumpers. 1 side air inlet in front of each rear wheel and extended wheel arches
Front suspension mc pherson strut with lower steel/titanium/aluminium wishbone, 1 longitudinal radius arm, coil spring, telescopic gas shock absorber and antiroll bar
Rear suspension mc pherson strut with lower steel/titanium/aluminium wishbone, 1 longitudinal radius arm, coil spring, telescopic gas shock absorber and antiroll bar
Steering system rack and pinion with hydraulic power assistance 2.5 turns lock to lock. 22.4/1
Brakes front ventilated disks 280mm diameter with 1 cast iron piston caliper 54mm diameter, or 280/295/305mm diameter with 4 aluminium piston calipers 42.5mm diameter. Rear solid disks 245mm diameter with 1 cast iron piston caliper 36mm diameter, or 280/295/305mm diameter with 4 aluminium piston calipers 42.5mm diameter dual circuit with servo, standard ratio split front to rear: 60%-40%
Dimensions
length: 4.404 m (173.4") width: 1.733 + 6% = 1.837 m (72.3") height: 1.346 m (53.0")
wheelbase: 2.524 m (99.4") front track: 1.465 m (57.7") rear track: 1.502 m (59.1")
Rims - tires speedline light alloy
snow or gravel: 6" - 8" x 15", tarmac: 10" x 15"
Kleber or Michelin
Weight 1120 - 1140 kg front-rear: 60% - 40%
Fuel tank 90 - 120 lt
Drag coefficient 0.43

Results in WRC

Statistics

1983 1984 1985 1986 Total
Works
Races /wins 4/2 4/2
Entries/finishes 11/8 11/8 (72.7%)
Others
Races +1 1 3 2 7
Entries/finishes 3/3 3/2 3/0 5/1 14/6 (42.9%)
Total WRC results
Races 5/2 1 3 2 11/2
Entries/finishes 14/11 3/2 3/0 5/1 25/14 (58.3%)
Total points 84 84
(7.636 per race)
(3.360 per entry)
Retirements Times
accident 2
engine 2
transmission 2
head gasket 1
alternator 1
lost wheel 1

Races

Works team: Audi Sport

Season
Entry Rally event
Driver
Codriver
Team M.C (SVE) POR KEN TdC GRE N.Z ARG FIN S.R (CdI) RAC
Hannu Mikkola
Arne Hertz
works 4th 1st 1st 2nd
Michèle Mouton
Fabrizia Pons
works acci dent 4th 2nd 3rd
Stig Blomqvist
Björn Cederberg
works 3rd trans miss ion
Vic Preston, Jr
John Lyall
works acci dent
Lasse Lampi
Pentti Kuukkala
3rd
Franz Wittmann
Peter Diekmann
Funkbe raterring Rally Team 7th 7th
Total points
()
84 15 25 23 17 4
Statistics
Works starts/finishes 11/8 3/2 2/2 3/2 3/2
Others starts/finishes 3/3 1/1 1/1 1/1

Works entry with Audi Quattro A2 since Tour de Corse


Article from Auto Express (Greece) 191, 6/1983

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Drawings

audiquattro_0071.jpg Source
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KKK K27 turbocharger

k26-explode-legend.jpg Source

Transmission

audi-quattro-I_x.jpg Source
audi-quattro-I_xx.jpg Source
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