Audi Sport Quattro S1 (1985)
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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 |
Table of Contents
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Chassis numbers here and here
On board in Verzegnis hillclimb 2012: see video
On board: see video (2006) and video
Walter Röhrl: see video
Rallying: see video and video2
Specifications
20 units builtGroup/Class | B/12 | Homologation number: B264 (12/01 ES) | |
Years active | 1985 - 1986 | Homologation start: 1/7/1985 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 | 2110 cc | WRC: x 1.4 = 2954 cc 1988: x 1.7 = 3587 cc |
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Bore x Stroke (mm) | 79.51 x 85.0 | ||
Compression ratio | 7.5:1 | ||
Output power - torgue | 550 HP / 7500 rpm 600 HP / 8000 rpm |
56.0 kgm (550 Nm) / 5500 rpm 60.1 kgm (590 Nm) / 5500 rpm |
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Main bearings | die-forged steel crankshaft with 6 main bearings 58mm diameter, big end journal diameter 47.6mm | forged steel connecting rod length center to center 144mm, big end bearing tunnel diameter 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 60.9/87mm diameter), air/air intercooler with antilag system (no water 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 | dry sump with 1 oil cooler | ||
Transmission | |||
Type | four wheel drive | 5 speed manual or 6 speed PDK (Porsche-Doppelkupplung) power shifted gearbox | |
Gearbox ratios | 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: 0.962/1 (25/26) R: 3.500/1 (42/12) |
1st: 3.000/1 (36/12) 2nd: 2.000/1 (32/16) 3rd: 1.526/1 (29/19) 4th: 1.167/1 (28/24) 5th: 0.963/1 (26/27) R: 2.875/1 (46/16) |
1st: 3.500/1 (28/8) 2nd: 2.273/1 (25/11) 3rd: 1.706/1 (29/17) 4th: 1.318/1 (29/22) 5th: 1.04/1 (26/25) 6th: 0.889/1 (24/27) R: 3.455/1 (38/11) |
Diffrential ratio | front and rear: 3.875/1 (31/8), 4.571/1 (32/7), 4.857/1 (34/7), 5.286/1 (37/7), 5.571/1 (39/7), 5.857/1 (41/7). 4.375/1 (35/8), 4.625/1 (37/8) |
output from secondary gearbox shafto to open or locked or limited slip 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. From FIN '85: torsen center differential with Ferguson coupling and adjustable torgue distribution 20%-80% to 80%-20% front to rear automatically | |
Clutch | dry, double disc | ||
Chassis-body | |||
Type | steel monocoque Typ 85 chassis version of VW B2 platform shortened by 320mm with roll-cage. Front steel subframe. 2 door coupe steel/kevlar bodyshell with front/rear plastic bonnets and bumpers. Aerodynamic spoilers to the front and rear of the car to increase downforce | ||
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. 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: 4.240 m (166.9") | width: 1.860 m (73.2") | height: 1.344 m (52.9") | |
wheelbase: 2.224 m (87.6") | front track: 1.465 m (57.7") | rear track: 1.502 m (59.1") | |
Rims - tires | front and rear 7" - 9.75" x 16" | Michelin | |
Weight | 1090 kg | front-rear: 52% - 48% | |
Fuel tank | 90 - 120 lt |
Results in WRC
Statistics
1985 | 1986 | Total | |||||
Total works WRC results | |||||||
Races /wins | 4/1 | 2 | 6/1 | ||||
Entries/finishes | 6/2 | 3/2 | 9/4 (44.4%) | ||||
Total points | 19 | 15 | 34 (5.667 per race) (3.778 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 | ||
Stig Blomqvist Björn Cederberg WAUZZZ85ZGA905005 |
works | eng ine | 2nd | ||||||||||||
Walter Röhrl Christian Geistdörfer WAUZZZ85ZGA905011 |
works | 1st | |||||||||||||
Walter Röhrl Christian Geistdörfer WAUZZZ85ZGA905002 |
works | acci dent | |||||||||||||
Hannu Mikkola Arne Hertz WAUZZZ85ZGA905003 |
works | oil loss | |||||||||||||
Hannu Mikkola Arne Hertz WAUZZZ85ZGA905010 |
works | eng ine | |||||||||||||
Total points () |
19 | 9 | 10 | ||||||||||||
Statistics | |||||||||||||||
Works starts/finishes | 6/2 | 1/0 | 2/1 | 1/1 | 2/0 |
Article from AUTOSPORT 7/1985
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Drawings
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page revision: 72, last edited: 02 Oct 2019 18:12