Courage Compétition, the French privateer constructor led by Yves Courage, had built and raced a succession of Group C prototypes since 1985, beginning with the C12 and progressing through the C20, C22, C24, and C26S. By 1992, Group C regulations were entering their final period, with the FIA's decision to mandate Formula One-specification 3.5-liter normally aspirated engines for the top class having already thinned the field of factory entrants. The Interserie, a European sports car championship running alongside the World Sports-Prototype Championship, provided an important additional competitive outlet for privateer teams such as Courage Compétition.
The C28 followed the template of its predecessors in the Cougar lineage as a closed Group C prototype powered by a 3.0-liter Porsche 6-cylinder turbocharged engine. By 1992 the Porsche turbocharged unit was a well-understood powerplant for the team, having been used across multiple generations of their designs. Group C regulations continued to apply fuel consumption limits, requiring teams to manage pace across race distances.
The C28's most prestigious result came at the 1992 24 Hours of Le Mans, where the car finished sixth overall. A top-ten finish at Le Mans for a privateer team running an established Porsche-engined chassis was a competitive outcome in the context of the event's field.
In the Interserie series, the C28 produced a concentrated run of podium results. Tomas Saldana drove the car to a third-place finish at the Interserie race at Jarama, a sixth-place at Zeltweg, and a third place at Brands Hatch. Separately, Marco Brand took a third-place finish for the car at the Interserie race at Mugello. The Interserie podiums at Jarama, Brands Hatch, and Mugello gave the C28 three podiums in addition to the class win recorded during the season, making it the most decorated car in terms of race results of the Cougar prototype family.
The Cougar C28 represented the culmination of the Cougar prototype lineage that Courage Compétition had built continuously since 1985. Across that span, the team progressed from the modest C12 — which finished 18th at the 1986 Le Mans — through the C20's overall podium at the 1987 Le Mans, and ultimately to the C28's cluster of Interserie podiums and its Le Mans sixth-place in 1992. The team's willingness to develop successive in-house designs while competing at the highest level of sports car racing over nearly a decade illustrated the sustained ambition and engineering capability that underpinned Courage Compétition's identity as a privateer constructor. Following the conclusion of the Group C era, the team moved on to new regulations and continued to compete at Le Mans under the Courage Compétition name.