Audi 90 Quattro Team Audi Sport No. 4 Röhrl Stuck Winner IMSA Watkins Glen 1989 Werk83 1:18

The Audi 90 quattro IMSA GTO stands as one of the most technically audacious racing cars to compete on North American circuits. Developed by Audi Sport in Germany for the 1989 IMSA GTO season, it brought permanent four-wheel drive and a 2.2-litre five-cylinder turbo into a class dominated by conventional rear-wheel-drive machinery. Werk83 has reproduced car #4 — the specific entry shared by Walter Röhrl and Hans-Joachim Stuck — in 1:18 die-cast, documenting a race win that contributed directly to Audi's 1989 IMSA GTO Manufacturers' Championship.

Engineering Against Convention

Built around a space-frame tube chassis clothed in carbon-kevlar bodywork styled to echo the road-going Audi 90 (Type 89), the IMSA GTO car had little in common with its showroom namesake beyond the silhouette. The five-cylinder turbocharged engine traced its lineage directly to the Group B quattro rally programme and drove all four wheels through Audi's quattro system — an arrangement virtually unique in the GTO class. The Holbert Racing-run North American operation represented Audi Sport on the IMSA circuits.

Röhrl, Stuck and the Watkins Glen Victory

Walter Röhrl brought two World Rally Championship titles (1980 and 1982) to the cockpit of car #4, having been a central figure in Audi Sport's European programmes through the previous decade. Hans-Joachim Stuck contributed deep experience across touring car, prototype and hillclimb disciplines as a long-standing Audi factory driver. Together they took car #4 to a GTO class win at Watkins Glen International in 1989, one of several victories Audi secured en route to the Manufacturers' Championship that season. The white, silver-grey and red Audi Sport livery, worn uniformly across the Holbert/Audi Sport entries, reflected Audi's broader European motorsport identity of the period.

The Werk83 1:18 Scale Model

Werk83 produces the car in die-cast at 1:18, a scale that allows the distinctive carbon-kevlar body contours, Audi rings branding and white-grey-red livery markings of car #4 to be rendered with precision. The model replicates the specific Watkins Glen 1989 race configuration — number 4, Röhrl and Stuck — making it a precise document of a championship-winning result rather than a generic livery study. Werk83 is an established name in highly detailed 1:18 die-cast models of significant motorsport subjects.