RX Audi Sport quattro S1 E2 – Olle Arnesson

Published on: Jan 17, 2016 @ 20:40
Originally Published in: 2015 (old website)
(C) Jay Auger - website owner & author
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Olle Arnesson already was a veteran of rallycross when the Group B era came along: he had already won the 1980 European Championship title while driving a Porsche. He switched to an Audi quattro and captured the 1983 & 1986 titles as well. For the 1987 season, he traded it for a short wheelbase Audi Sport quattro S1 E2 where he finished 3rd.

Arnesson competed with his S1 E2 in the European Championship until 1989 when he quit to compete in his national Swedish series probably due to the new 1.7 forced induction multiplier imposed by the FISA in the European Championship which required a higher minimum weight for the Audi.

Over its history, the car went through several liveries and aerodynamic variations up until the Group B cars were forcefully retired from rallycross at the end of 1992.

Little is known about the full specifications of Arnesson’s S1 E2 but since the WRC works version was known to produce up to 600 HP it is safe to assume that it probably has been augmented in the area of 700 to 800 HP in the later rallycross horsepower wars.

Arnesson still owns the car and has since made appearances in retro race events.

Arnesson at the 2014 Lydden Hill RX


Group/Class Formula A / Division 2 Championships: none
Years active 1987~1992 Best finish: 3rd (1987)
Type I-5, DOHC 20v, gas engine located front longitudinal with 27.5right inclination
Displacement 2110 cc
Compression ratio 7.5:1
Output power – torque 600+ HP @ – rpm – lb-ft @ – rpm
Materials block: aluminium cylinder head: aluminium
  • turbocharger
  • air/air intercooler with water injection
  • Bosch LH-jetronic multipoint electronic fuel injection
Boost: N/A
Ignition electronic / firing order 1-2-4-5-3
Cooling system water-cooled
Lubrication system dry sump with 1 oil cooler
Type four wheel drive 5 or 6 speed manual gearbox
Gearbox ratios N/A
Differential ratio N/A Torsen centre differential with Ferguson viscous coupling and adjustable torque distribution 20%-80% to 80%-20% front to rear automatically
Clutch dry – double plate
Type Steel monocoque Typ-85 chassis version of VW B2 platform shortened by 320mm with roll-cage. Typ-81 windshield. Front steel subframe. 2 door coupe steel/kevlar bodyshell with plastic front/rear bonnets and bumpers. Aerodynamic spoilers to the front and rear of the car to increase downforce.
Front suspension McPherson strut with lower wishbone, coil spring, gas shock absorber and antiroll bar
Rear suspension McPherson strut with lower wishbone, 1 longitudinal radius arm, coil spring, gas shock absorber and antiroll bar
Steering system rack and pinion with hydraulic power assistance 12.4:1
Brakes front/rear ventilated rotors with 4 piston calipers dual circuit with servo
length: 4240 mm (166.9 in) width: 1860 mm (73.2 in) height: 1344 mm (52.9 in)
wheelbase: 2224 mm (87.6 in) front track: 1520 mm (59.8 in) rear track: 1502 mm (59.1 in)
Rims – tires 16 inch Firestone
Dry/Unladen Weight 1050 kg (2315 lb) *estimated Bias: N/A
Weight/power N/A
Fuel tank 25 litres



(C) Article by Jay Auger – website owner & author

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