The 88C was developed as part of Toyota's sustained assault on international sports car racing during the late 1980s, a period when the manufacturer was expanding its footprint across the All Japan Sports Prototype Championship, the World Sports-Prototype Championship, and North American endurance racing. Power came from a turbocharged inline engine producing approximately 600 horsepower in its IMSA configuration, and the car was campaigned primarily under the Toyota Team Tom's banner in Japan and Europe.
The 88C made its competitive debut in the 1988 All Japan Sports Prototype Championship, where Toyota Team Tom's ran a two-car program. The best results that season were a pair of fifth-place finishes, achieved at the Suzuka 500 km and Suzuka 1000 km rounds.
Toyota Team Tom's entered two 88Cs at the 1988 24 Hours of Le Mans, and both cars finished the grueling endurance event. The car shared by Geoff Lees, Masanori Sekiya, and Kaoru Hoshino came home twelfth overall, while the second entry was classified twenty-fourth. Toyota returned to Le Mans in 1989 with one 88C alongside two of the newer 89C-Vs, but none of the three Toyota entries reached the finish that year.
Beyond its Le Mans appearances, the 88C made a brief foray into the 1988 WSPC at the 1000 km of Fuji, which doubled as the final round of that year's All Japan Sports Prototype Championship. Early in the 1989 season, Toyota Team Tom's entered a single 88C at Dijon-Prenois while waiting for deliveries of the newer 89C-Vs. Driven by Geoff Lees and Johnny Dumfries, the car delivered a strong fourth-place finish in that outing.
In 1989 Toyota partnered with All American Racers to contest the GTP category of the IMSA Camel GT Championship. AAR fielded two cars: one was a purpose-designed Eagle HF89, while the other was a modified 88C. Both were powered by the same turbocharged inline-four engine producing approximately 600 horsepower.
The 88C-based car debuted at the 1989 Daytona 24 Hours but retired before the finish. As the season progressed, difficulties with the HF89 led AAR to concentrate development resources on the 88C, which proved to be the more competitive of the two entries. The car's best result in the IMSA series was a second-place finish at San Antonio, and it claimed pole positions at Road Atlanta and Lime Rock, demonstrating genuine front-running pace even against the established American GTP machinery.
The Toyota 88C occupies a transitional role in Toyota's sports car racing lineage. It demonstrated that Dome could successfully iterate on an existing platform to remain competitive across multiple championships simultaneously, and its IMSA campaign with All American Racers established an early bridgehead for Toyota in North American prototype racing. The experience accumulated with the 88C directly informed the design and deployment of the more sophisticated 89C-V, which carried Toyota's Group C ambitions forward into the new decade.