The Audi 90 was Audi’s more upscale, better-equipped sibling to the Audi 80, created to give the compact executive car line a higher-positioned five-cylinder variant. The nameplate first appeared in the mid-1980s on the B2-era car, when Audi used it to distinguish the richer, more prestigious versions of the 80 family from the mainstream four-cylinder models. In that first period, the 90 helped Audi broaden its range beyond the volume-oriented 80 and reinforce the brand’s move upmarket.
A second generation of the Audi 90 arrived with the B3-era 80 platform in 1987. This version continued the idea of a more premium sister model, with five-cylinder engines reserved for the 90 while the standard Audi 80 range handled the lower end of the lineup. That made the 90 an important bridge between the everyday 80 and Audi’s later higher-end sedans, combining understated styling with the five-cylinder smoothness and character that became a hallmark of the brand in the 1980s.
The 90 also became closely associated with Audi’s quattro identity through motorsport. Most famously, the Audi 90 quattro IMSA GTO of 1989 carried the nameplate onto American circuits and became one of Audi’s best-known competition cars of the era. That racing presence gave the 90 enduring enthusiast appeal, even though the road car itself remained a discreet sedan rather than a flashy performance model.
The Audi 90 nameplate ended after the B3-era run, before Audi’s later naming shift to the A-series in the 1990s. As a result, the 90 is remembered as a compact luxury Audi from the company’s pre-Audi-A era: quietly premium, mechanically distinctive, and historically important in the transition from the 80-based lineup to Audi’s modern brand identity.