Audi Sport UK Press Release from 28/10/1981 with technical specifications of the Audi Quattro in Group 4 specification.
All rights to the content belong to Audi, I am merely posting the information for historical purposes – Double G.
Folder Cover
Modifications to the Audi Quattro for rallying
Body:
Floor reinforcements and aluminium roll cage extending from the front bumper through the whole vehicle.
Aluminimum dashboard with special instrumentation and quick-release catches. Racing seats and extinguisher system. Aluminium front bumpers, bonnet and doors; plastic boot lid.
Brakes:
Four ventilated discs with bolt-on aluminium hubs, light alloy calipers and adjustable brake pressure regulator (no hydraulic servo), hand brake acting hydraulically on rear wheels.
Steering:
Power assisted, driven off the camshaft.
Transmission:
5-speed gearbox with special ratios for rallying
1 – 3.00
2 – 2.00
3 – 1.50
4 – 1.217
5 – 1.040
Differentials: 4.11, 4.55 or 4.87
Running Gear:
Wishbones, steering knuckles, tie rods, springs, shock absorbers and stabilisers strengthened and , where permissible, adapted to suit the difficult service and repair conditions in a rally. Similar measures adopted fore the mountings for engine, gearbox, rear differential and front and rear subframes. Aluminium underbody guards front and rear.
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