Gustav Brunner
Rial Racing had run the tidy Rial ARC1, designed by Gustav Brunner, in 1988 and had scored three points with it. For 1989, a new chassis, largely based on the previous year's car and designated the ARC2, was designed by Stefan Fober, with input from Bob Bell and Martin Goodrich. The chassis was configured with double wishbone pullrod suspension, front and rear, with Koni dampers. The wheelbase of the chassis was and it had a front track of . The rear track was less, .