Audi Quattro A1 group B (1983)
 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
Click here| 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, 88mm bore spacing, 220mm deck height | 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
Click here
Source
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Drawings
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KKK K27 turbocharger
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Transmission
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page revision: 83, last edited: 02 Oct 2019 18:09