ratios in the gearbox and rear differential. The damper and spring rates were also different from the Ur-Q. It was thus largely identical to the Audi 90 quattro and the North American Audi 4000 quattro. Wheels were 6.0Jx14", with steel or aluminium alloy rims dependent on the market. 7.0Jx15" Ronals, almost identical to the Ur-Quattro wheels, were also available. The CQ/90Q/4000Q also received their own exhaust manifold and downpipe (5-3-1, while FWD versions were 5-2-1). From September 1980 to September 1987, 174,687 Typ 81 Coupés were built. Quattro production ran from late 1984 to 1988, and was in the total region of 8,000 cars. Coupé B3 In October 1988, and after a brief hiatus for the Audi Coupé, a new three-door Coupé was introduced in Europe. This generation is known internally as the Typ 8B and is basically a Typ 89 saloon with a modified rear suspension and a new front suspension system which previewed what was to come in the B4 Audi 80. When introduced it was only available with either the ten- or twenty-valve 2.3E engine, which was later joined by the 2.0E and a number of other versions. In February 1989 a 20-valve version of the 2.0-liter five-cylinder engine went on sale in Italy. This was the only version of the Coupé sold in Italy, where cars of over two liters suffer a high tax penalty. It was not offered anywhere besides Italy and Portugal as it was never fitted with a catalytic converter. The engine produces and this model was built until July 1991. Another export-market special built during the same period was an uncatalyzed, fuel injected 1.8-liter inline-four. A naturally aspirated, 2.2E was also sold in some markets until late 1991, including the United Kingdom and Spain. In September 1990 the sporty S2 Coupé was introduced, followed one year later by a more luxury-oriented 2.8-liter V6 version. The Coupé received similar updates to the B4 Audi 80 and remained in production until December 1996. The Coupé did not have a direct replacement but was effectively succeeded by the first-generation Audi TT coupé (and roadster), sold between 1998 and 2006. S2 Coupé Together with Konrad Schmidt Motorsport GmbH (SMS), who had been responsible for Audi's DTM version of the V8 quattro, Audi developed a sports version of the Coupé in September 1990 called the Audi S2. This was meant to boost lagging sales of the Coupé