

Four trim levels namely Progression, Distinctive, Exclusive, and Turismo Internazionale (TI) were generally available. Several levels of trim were available depending on the market. Alfa Romeo intended for the 159 to compete more directly with BMW, Mercedes-Benz and Audi by using higher-quality interior materials. The interior recalls styling elements from earlier cars, including the 156, such as deeply recessed instruments angled toward the driver.

Initial Centro Stile proposals of Tipo 939 exterior from 2001 were rejected but the interior design would be developed further. Several exterior design cues were intended to make the car appear larger, supposedly to appeal to potential buyers in the United States where the 159 was ultimately never marketed. Ī high waistline broadens until it reaches the rear "C" pillar. Similar to its coupé counterpart, the front of the car was influenced by the 2002 Brera Concept also designed by Giugiaro, as Fiat asked Giugiaro to transfer the design of the later on its future saloon. The nose features a traditional Alfa Romeo V-shaped grille and bonnet, and cylindrical headlight clusters. The 159 was designed by Giorgetto Giugiaro in collaboration with the Centro Stile Alfa Romeo.
