When reach level 30, the Bugatti Veyron is the best car. If you add a race air filter, race fuel system, race displacement, race pistons and compression, race flywheel, race oil and cooling, and every other power upgrade, then add the race brakes, race springs and dampers, race weight reduction, race clutch, race driveline, Forza 3 front bumper, Forza 3 rear wing, race tire compound, the widest tires, the second set of wheels from 5Zigen, then the 20 front wheels, it will be at class R2 and have a performance index of 854. It will not handle as well as the other R2 class cars but will have 937 kilowatts and can reach 97 km/h in 1.8 seconds.