Robert Opron's final design for Citroën was the CX in 1974. The Citroën CX was launched at the 1974 Paris Salon replacing the venerable DS. Named 'CX' after the French word for drag coefficient, it was awarded the European Car of the Year. Power was supplied by the existing 1985cc DS engine, now transversely mounted, but there was also a 2175cc unit available in the CX 2200 Berline Club. In 1976 a 2200 Diesel was added and then a 2347cc engine for the 2400 Prestige. The Prestige shared the same long wheelbase platform as the Estate model launched in 1976 and variously called the Safari or the Break. Fuel injected 2400 engines were available from 1978, and the Peugeot 2500 diesel became available. The 2000 models were given a new 1995cc engine in 1979 that was shared with Peugeot, Renault and Volvo. Series II models were launched in 1985 with new plastic bumpers. Citroën XM sallons replaced the CX in 1989 and the XM estate replaced the CX Safari in 1991