Audi Sport Quattro S1 WRC Group B Audi Sport #2 Walter Röhrl 1986

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The true Group B Quattro WRC, seemingly skipped in favor of the Pikes Peak model for the Gr.B class at GT Sport's launch.

Engine: Audi R5 20vT 2142cc Inline-5 Turbo
Power: 476 PS/469 hp
Weight: 1090 kg/2409 lbs
Expected Class: Gr.B

Audi introduced full-time 4WD technology into the World Rally Championships in 1981, and showed incredible performance right from the outset. In 1982 they achieved a double victory for both the manufacturers and driver titles, a driver title victory in 1983, and a double title again in 1984.

Year-on-year the car continued to improve, and in the autumn of 1983 they sold 200 of the 2133 cc 5-cylinder turbo-powered Sport quattros for Group B homologation, and it entered racing from 1984.

In 1985 at Tour de Corse, a further improved Sport quattro made its debut. This was the Sport quattro S1, also called the Sport quattro E2 in some countries.

The engine itself was basically unchanged but it incorporated improvements such as the misfiring (Anti-lag) system, and the final output of the engine was increased to 591 BHP. One improvement of note was also the transmission, a 6-speed semi-automatic with a clutch sensor in the shifter. Later in the year it was also given an aerodynamic body with front spoilers and large front wheel arches to match, together with rear arches with air inlets and a rear wing. By this time the car had matured into the ultimate rallying quattro.

In the same period, Audi modified a WRC spec Sport quattro S1 to hill climb specifications and took part in the Pikes Peak International Hill Climb. The results were spectacular, with Michèle Mouton and Walter Röhrl winning and resetting the track record in 1985 and 1987 respectively.
 
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