Audi Quattro (Gr.4)
Audi had for a longer period wanted to participate in the World Rally Championship, and when FIA approved the use of fourwheeldrive in it’s big division, the group 4, it all started for the rallye Quattro – a stiffened up, tuned and enhanced rallye version of its road-going sibling.
The rallye version of the street Quattro was made by Audi Sport themselves, with more or less the same 10V engine, now rated around 320 hp. It was to be showcased in 1980 by Mikkola running 0-car at the Algarve rallye, and later trialed by Franz Wittmann in the 1981 Jänner rallye. Mikkola made 30 min lead over the officially competing cars, and Wittmann finished with a 20 min gap to second place. Audi was set to officially introduce the Quattro for the 1981 Monte Carlo 1981, and the Group 4 Quattro had it’s last race in the 1982 RAC.
Engine: inline 5, cast-iron block, alu-head, 10V, special steel-conrods.
Capacity: 2144 cc by bore 79,5 mm x 86,4 mm stroke
Power: 320hp / 6500 rpms
Torque: 412Nm / 3250 rpms
Engines fitted with KKK K27 turbochargers that put out 1.5~1.6 BAR, and had Pierburg injection system. Drive train was a similar ‘016’ 5-speed gearbox, locked center-differential and 75% lockable rear-differential, Fichtel & Sachs clutch. McPherson struts with Boge rallye dampers, or rallye coilovers. 2524mm wheelbase and 1465 mm width in front, and 1502 mm at rear. Depending on gearing, topspeed between 173 km/h and 253 km/h. 0 – 100 km/h between 4.9 and 5.2 sec.
Brakes were 280 mm, hydraulic handbrake. Fuchs 5 spoked 6″ or 7″ wide wheels for rough roads, or 10″ for asphalt racing – all 15″ diametre and primarily fitted with Weber tires.
Length/height/width is 4404/1733/1344 mm, weight between 1190 and 1240 kg, FIA rules states minimum 1005 kg. The Group 4 Quattro was succeeded by the Quattro A1.