Audi
90 quattro IMSA GTO

Why it matters

The 90 quattro was Audi's 1989 works entry in the American IMSA GTO series, following the 1988 Trans-Am season. It carried the most powerful five-cylinder works engine Audi had raced and won seven races in its single season.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Each kind of rarity is rated separately and never combined.

Photos

Exterior, interior and detail photos with their licences.

• Audi 90 quattro IMSA GTO (Wikimedia Commons: Audi 90 quattro IMSA GTO)
  Photo: Calreyn88 · CC BY-SA 4.0
• Audi 90 quattro IMSA GTO (Wikimedia Commons: Audi 90 quattro IMSA GTO)
  Photo: s at de.wikipedia · CC BY-SA 3.0

Production

Every figure says what it counts.

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

Audi chose IMSA GTO for 1989 because its freer rules suited the quattro layout better than the tightening Trans-Am regulations. Only the silhouette of the 90 quattro was kept, and under the carbon-fibre skin the car was a pure racing machine. Audi had prepared a winter test car to the rules and committed to GTO in mid-January 1989.

The car won seven of 13 races. Hans-Joachim Stuck finished third in the drivers' standings and Audi took second place in the manufacturers' ranking.

Technical specifications

Engine

Transmission & drivetrain

Chassis, body & dimensions

Performance

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

Sources

Each number links to the exact facts it supports.

1. 1
   Ultimatecarpage – Audi 90 Quattro IMSA GTO Level C

   • 6 Purpose-built IMSA GTO race cars (spec field "Numbers built: 6")

   Accessed 2026-11-12
2. 2
   Audi 90 quattro IMSA GTO, model year 1989 Level A Audi MediaCenter · 2016-08-30

   • fivecylinder works engine
   • 2.2-liter high-performance unit specially designed for racing
   • The turbocharged aluminum engine
   • 530 kW (720 hp) at 7,500 revolutions per minute
   • at 7,500 revolutions per minute
   • 720 newton meters at 6,000 rpm

   Accessed 2026-11-12
3. 3
   1989 Audi 90 quattro IMSA GTO Level B supercars.net

   • the car four driven wheels
   • under the GTO carbon-fibre skin was a pure racing car

   Accessed 2026-11-12