Audi Sport Quattro S1 (1985)
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Home » Rally Cars » Audi Sport Quattro S1
014708337-10.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

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

Group/Class B/12 Homologation number: B 264 (12/01 ES)
Years active 1985 - 1986 Homologation start: 1/7/1985
Engine
Type KW, 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 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
Main bearings 6 of 58mm diameter connecting rod distance between centers 144mm, big end bearing diameter 50.6mm
Materials block: aluminium alloy cylinderhead: aluminium alloy
Cams/valves 2 overhead camshafts (DOHC), belt driven 4 valves/cyl. - 20 valves total. 32.2mm inlet valves diameter, 28.2mm exhaust valves diameter
Aspiration KKK K27 turbocharger (CrNiSi turbine 76.2mm diameter, aluminium compressor 87mm diameter), air/air intercooler with water injection and antilag system, Bosch LH-jetronic multipoint electronic fuel injection pressure:
Ignition electronic, firing order 1-2-4-5-3
Cooling system watercooled
Lubrication system dry sump with 1 oil cooler
Transmission
Type four wheel drive 5 or 6 speed PDK (Porsche-Doppelkupplung) power shifted or manual 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 disk
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 wishbone, coil spring, telescopic gas shock absorber and antiroll bar 19-22-25-28mm diameter
Rear suspension mc pherson strut with lower 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 22.4/1
Brakes front ventilated disks 280/295/304/330mm diameter with 4 aluminium piston calipers. Rear ventilated disks 280/295/304mm diameter with 4 aluminium piston calipers (Lockheed or Girling) dual circuit with servo
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%
Weight/power 2.0 kg/HP
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
Click on tabs
Season
Entry Rally event
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 1st acci dent
Hannu Mikkola
Arne Hertz
works oil loss eng ine
Stig Blomqvist
Ilkka Kivimäki
works eng ine 2nd
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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