rallye 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.
A rallye version of the street Quattro was made by Audi Sport, with the same 10V engine rated at 320hp and trialed by Franz Wittmann in the 1981 Jänner rallye, winning all stages and 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: 2144cc by bore 79,5mm x 86,4mm stroke
Power: 320hp / 6500 rpms
Torque: 412Nm / 3250 rpms
Engines fitted with KKK K27 turbochargers that put out 1.5~1.6BAR, and had the first Hitachi MAC-10 management (similar to the production cars), but was later changed for Bosch units. Drivetrain was a 5 speed gearbox, lockable center-differential and 75% lockable rear-differential, Fichtel & Sachs clutch. McPherson struts with Boge rallye dampers, or rallye coilovers. 2524mm wheelbase and 1465mm width in front, and 1502mm at rear. Depending on gearing, topspeed between 173km/h and 253km/h. 0 – 100km/h between 4.9 and 5.2 sec.
Brakes were 280mm, 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 4404/1733/1344mm, weight between 1190 and 1240kg, FIA rules states minimum 1005kg.