The Audi S2 and RS2
Audi developed a sports version of the 80/90 in 1991, based on the B4 platform called the S2. This featured a 2.2l 20-valve turbo engine derived from that used in the Sport Quattro. A similar version of the engine was used in the Audi 100 based S4. It came as standard with quattro all wheel drive and featured a heavy-duty manual transmission, initially 5-speed and then upgraded to a 6-speed for 1993.
The Audi S2 was initially available only as a 2-door sports coupe, but later, in 1993, a 5-door S2 Avant model was introduced, along with a limited run of 4-door S2 sedan models of which 306 were produced. The S2 sedan and Avant feature a lot similarities in the rear axle support system to the later B5 body A4 quattro. The B4 platform S2 Avant was also used between 1993 and 1995 as the basis for Audi's RS2 super-sports wagon, which was modified for them by Porsche.
The S2 was initially available with a 2.2 L turbocharged engine which produced 220 hp (162kW) with later models producing 230 hp (169kw) . It will do 0-100 km/h in 5.8 seconds, continuing to a top speed of 246 km/h (154 mph). The S2 avant reaches 100km/h in 6.1 seconds and has a top speed of 242 km/h.
Audi RS2 Avant
The RS2 is fitted with a similar 2.2l turbocharged engine, producing 315 hp (234kW). Reaching 100 km/h in just 4.8 seconds, it has a top speed of 262 km/h. The Audi RS2 was generally only available as an Avant, although four 4-door sedan models were officially produced by the factory, including one for the chief of the RS2 development programme. The RS2 was at least partially assembled at Porsche's Rossle-Bau plant in Zuffenhausen. Prior to manufacturing the RS2, the Porsche Zuffenhausen assembly line was busy producing the high-performance W124 bodystyle Mercedes Benz 500E. The RS2/Porsche link is further exemplified by the RS2's dual circuit Porsche braking system (wearing Porsche branded Brembo calipers), 7jx17 alloy wheels that were identical in design to the Porsche 911 Turbo wheels of that era, and side view mirrors are also borrowed from the Porsche 911 Turbo. Additionally, the word "PORSCHE" is inscribed in the RS2 factory emblems affixed to the trunk and front grille, and on the engine's inlet manifold. Porsche modified the Avant S2 body optics, added more power, better brakes, bigger anti-roll bars to front and rear, fine tuned the interior and a super-sports wagon was born. Porsche's involvement in the project was on the strict understanding that a coupe model would not be produced as this was felt to be too close to Porsche's own products.
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