Complex sentence: The 1991 24 Hours of Le Mans would be the last time the 787B would compete in international motor racing, and the last win for a car with Dunlop tires.
Split into simpler sentences: The 1991 24 Hours of Le Mans would be the last time the 787B would compete in international motor racing. Also it would be the last win for a car with Dunlop tires.