The Saab 9000 was engineered in close partnership with the Italian Fiat Group as part of the Type Four platform-sharing venture, alongside the Fiat Croma, Lancia Thema, and Alfa Romeo 164. Debuting in 1984 as a spacious five-door liftback (later designated CC), the lineup expanded in 1988 with the introduction of the traditional four-door CD notchback sedan, featuring a unique front clip and rear end. In 1991, Saab launched the CS variant, introducing a heavily redesigned five-door body with slimmer headlights, modernized styling cues, and improved structural rigidity. Under the hood, the 9000 featured iconic 2.0-liter and 2.3-liter inline-four engines from the Saab B202, B204, and B234 families, available in naturally aspirated and high-output turbocharged configurations managed by Saab Direct Ignition and Trionic engine management systems. A 3.0-liter naturally aspirated V6 sourced from General Motors was also offered. Drivetrain options consisted of a five-speed manual transmission or a four-speed ZF automatic. The model enjoyed strong sales in Europe, North America, and selected Asian markets, achieving legendary status through the high-performance Aero variant.