Audi Sport Quattro group B (1984)
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Audi Sport Quattro in RAC rally '84
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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
Specifications
200 units builtGroup/Class | B/12 | Homologation number: B264 (03/01 ET) | ||
Years active | 1984 - 1985 | Homologation start: 1/5/1984 Homologation end: 31/12/1990 |
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Engine | ||||
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Type | Audi R5T 20V KW, straight 5 cyl, 4 stroke, petrol engine | located front longitudinal with 27.5o inclination to co-drivers side (LHD) | ||
Capacity | 2134 or 2110 cc | WRC: x 1.4 = 2989 or 2954 cc 1988: x 1.7 = 3629.5 or 3587 cc |
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Bore x Stroke (mm) | 79.3 x 86.4 79.51 x 85.0 |
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Compression ratio | 7.5:1 | |||
Output power - torgue | 450 HP / 7500 rpm | 46.9 kgm (460 Nm) / 5500 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 or 140mm, big end bearing tunnel diameter 49mm or 50.6mm, aluminium alloy piston | ||
Materials | block: aluminium alloy with GG cast iron cylinder liners, 88mm bore spacing, 220mm deck height | cylinderhead: cross flow cast aluminium alloy with hemispherical combustion chambers | ||
Cams/valves | 2 overhead camshafts (DOHC), belt driven | 4 valves/cyl. - 20 valves total. 32.2mm inlet valves diameter, 28.2mm exhaust valves diameter. 25o angle between inlet valve axis and vertical, 25o angle between inlet valve axis and vertical | ||
Aspiration | KKK K27 turbocharger (12 blades CrNiSi alloy turbine 64/76.2mm in/out diameter, 12 blades aluminium compressor 48.2/76mm diameter), air/air intercooler with water injection, Bosch LH-jetronic multipoint hydraulic fuel injection. Bosch Sport multipoint electronic hydraulic fuel injection | pressure: | ||
Ignition | electronic, firing order 1-2-4-5-3 | |||
Cooling system | jacketed watercooled with pump, radiator, fan and thermostat | |||
Lubrication system | wet or dry sump with 1 oil cooler | |||
Transmission | ||||
Type | four wheel drive | 5 speed or 6 speed power shifted or manual gearbox | ||
Gearbox ratios | 1st: 3.500/1 (28/8) 2nd: 2.083/1 (25/12) 3rd: 1.368/1 (26/19) 4th: 0.962/1 (25/26) 5th: 0.821/1 (23/28) R: 3.500/1 (42/12) |
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) |
Evolution only: 1st: 2.700/1 (27/10) 2nd: 2.083/1 (25/12) 3rd: 1.706/1 (29/17) 4th: 1.428/1 (30/21) 5th: 1.217/1 (28/23) 6th: 1.040/1 (26/25) R: 3.455/1 (38/11) |
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Diffrential ratio | front and rear: 3.875/1 (31/8), 4.571/1 (32/7), Evolution only: 4.857/1 (34/7), 5.286/1 (37/7), 5.857/1 (41/7). 1985+: 5.571/1 (39/7) |
100% locked 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 disk | |||
Chassis-body | ||||
Type | steel monocoque Typ 859 chassis version of VW B2 platform shortened by 320mm with roll-cage. Front steel subframe. 2 door coupe steel/kevlar bodyshell with plastic front/rear bonnets and bumpers. 1 side air inlet in front of each rear wheel | |||
Front suspension | mc pherson strut with lower steel/titanium/aluminium wishbone, 1 longitudinal radius arm, coil spring, telescopic gas shock absorber and antiroll bar 19-22-25-28mm diameter | |||
Rear suspension | mc pherson strut with lower steel/titanium/aluminium wishbone, 1 longitudinal radius arm, coil spring, telescopic gas shock absorber and antiroll bar 19-22-25-28mm diameter | |||
Steering system | rack and pinion with hydraulic power assistance | ratio 22.4/1 | ||
Brakes | front ventilated disks 295mm diameter with 4 aluminium piston calipers 41.3mm diameter (Lockheed or Girling), rear ventilated disks 295mm diameter with 4 aluminium piston calipers 41.3mm diameter. Ventilated disks all around 280/304/330mm diameter with 4 aluminium piston calipers 42.5/43mm diameter. 1985: front ventilated disks 330mm diameter with 4 aluminium piston calipers 43/44.4mm diameter or 2+2 piston calipers 2x44.4 + 2x40.7mm diameter, rear ventilated disks 280mm diameter with 4 aluminium piston calipers 31/33.9/34.9mm diameter. |
dual circuit with VW/Audi hydraulic servo, adjustable ratio split front to rear | ||
Dimensions | ||||
length: 4.160 m (163.8") | width: 1.790 + 6% = 1.817 m (71.5") | height: 1.340 m (52.8") | ||
wheelbase: 2.224 m (87.6") | front track: 1.520 m (59.8") | rear track: 1.490 m (58.7") | ||
Rims - tires | front and rear 7" - 9" x 15" or 16" | Michelin | ||
Weight | 1100 kg | front-rear: 52% - 48% | ||
Fuel tank | 90 - 120 lt |
Results in WRC
Statistics
1984 | 1985 | 1986 | Total | ||||
Works | |||||||
Races /wins | 6/1 | 8 | 14/1 | ||||
Entries/finishes | 9/2 | 16/9 | 25/11 (44%) | ||||
Others | |||||||
Races | 2 | 2 | |||||
Entries/finishes | 2/1 | 2/1 (50%) | |||||
Total WRC results | |||||||
Races | 6/1 | 8 | 2 | 16/1 | |||
Entries/finishes | 9/2 | 16/9 | 2/1 | 27/12 (44%) | |||
Total points | 17 | 71 | 8 | 96 (6.000 per race) (3.555 per entry) |
Races
Works team: Audi Sport
Season
Entry | Rally event | ||||||||||||||
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Driver Codriver |
Team | M.C | (SVE) Entry list |
POR | KEN | TdC | GRE | N.Z | ARG | FIN | S.R | (CdI) | RAC | ||
Walter Röhrl Christian Geistdörfer |
works | eng ine | clutch | acci dent | |||||||||||
Hannu Mikkola Arne Hertz |
works | steer ing | |||||||||||||
Stig Blomqvist Björn Cederberg |
works | 1st | |||||||||||||
Stig Blomqvist Björn Cederberg RS02 |
works | eng ine | |||||||||||||
Michèle Mouton Fabrizia Pons RS02 |
works | 4th | |||||||||||||
Michèle Mouton Fabrizia Pons RS05 |
works | eng ine | acci dent | ||||||||||||
Total points () |
17 | 10 | 7 | ||||||||||||
Statistics | |||||||||||||||
Works starts/finishes | 9/2 | 1/0 | 2/0 | 2/0 | 2/0 | 1/1 | 1/1 |
Source
Audi Sport Quattro in RAC rally '84
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Drawings
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page revision: 71, last edited: 19 Sep 2022 07:38