Audi Quattro A2 group B (1983)
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Home » Rally Cars » Audi Quattro A2
A2_01sm.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

Specifications

Group/Class B/12 Homologation number: B 243 (04/01 ET)
Years active 1983 - 1984 Homologation start: 1/5/1983
Engine
Type WR, straight 5cyl, 4 stroke, petrol engine located front longitudinal with 27.5o right inclination
Capacity 2110 cc WRC: x 1.4 = 2954 cc
Bore x Stroke (mm) 79.51 x 85.0
Compression ratio 6.5:1
Output power - torgue 350 - 370 HP/ 7000 rpm 45.9 kgm (450 Nm) / 3400 rpm
Main bearings 6 of 54mm diameter connecting rod length between centers 136mm, big end bearing diameter 49mm
Materials block: aluminium alloy cylinderhead: aluminium alloy
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 (nickel alloy turbine 76.2mm diameter, aluminium comperessor 82mm diameter) with air/air intercooler, Bosch multi point electronic fuel injection pressure:
Ignition electronic, firing order 1-2-4-5-3
Cooling system watercooled
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: 1.174/1 (27/23)
5th: 0.962/1 (25/26)
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: 1.040/1 (25/24)
R: 3.500/1 (42/12)
1984+: 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)
R: 3.500/1 (42/12)
Diffrential ratio front and rear, 4.285/1 (30/7), 4.375/1 (35/8), 4.571/1 (32/7), 4.857/1 (34/7) 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 and polypropylene bodyshell with polypropylene doors, polypropylene front/rear bonnets, polypropylene bumpers and polypropylene rear spoiler
Front suspension mc pherson strut with lower wishbone, 1 longitudinal radius arm, coil spring, telescopic gas shock absorber and antiroll bar
Rear suspension mc pherson strut with lower 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, or 280/295/305mm diameter with 4 aluminium piston calipers. Rear solid disks 245mm diameter with 1 cast iron piston caliper, or 280/295/305mm diameter with 4 aluminium piston calipers dual circuit with servo, standard ratio split front to rear: 60%-40%
Dimensions
length: 4.404 m (173.4") width: 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" - 11" x 15"
Michelin
Weight 1000 - 1100 kg front-rear: 60% - 40%
Weight/power 2.9 kg/HP
Fuel tank 90 - 120 lt
Drag coefficient 0.43

Results in WRC

Statistics

1983 1984 1985 1986 Total
Works
Races /wins 8/3 11/6 19/9
Entries/finishes 24/13 25/19 49/32 (65.3%)
Others
Races 8 5 13
Entries/finishes 6/4 12/4 16/9 8/3 42/20 (47.6%)
Total WRC results
Races 8/3 11/6 8 5 32/9
Entries/finishes 30/17 37/23 16/9 8/3 93/52 (55.9%)
Total points 118 186 42 5 351
(10.969 per race)
(3.774 per entry)

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 acci dent eng ine fuel inje ction 1st 1st fire 2nd 2nd
Michèle Mouton
Fabrizia Pons
works fire acci dent eng ine 3rd 16th 7th acci dent
Stig Blomqvist
Björn Cederberg
works 3rd with drawn 2nd 2nd acci dent 1st
Shekhar Mehta
Yvonne Mehta
works 4th
Bernard Darniche
Alain Mahé
works 9th
Luis Di Palma
Nestor Straimel
works acci dent
Lasse Lampi
Pentti Kuukkala
works 7th* with drawn 4th*
Per Eklund
Ragnar Spjuth
Sesab Service 4th
John Buffum
Neil Wilson
BF Goodrich Motor sport 6th
Darryl Weidner
Rob Arthur
Clearlite fire
Antero Laine
Pekka Hokkanen
fire
Total points
()
118 8 34 30 6 9 31
Statistics
Works starts/finishes 24/13 2/0 3/1 3/0 5/4 3/3 5/2 1/1 3/2
Others starts/finishes 6/4 2/2 4/2

*Private entry with VV Auto


i3.jpg Source
Portugal_84_Audi_Quattro_A2.jpg Source
Walter Röhrl in Rally Portugal '84
audi-quattro-sport-rallye-monte-carlo-1983-2.jpg
In Monte Carlo 1983

Drawings

AUDIQUATTRO-P.jpg Source
audiquattro_0071.jpg Source

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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