You will have to mod the racing R390 to run against the Toyota. The Nissan R390 is under 500 HP when first won. The GT-ONE road car is at 600, the race car has more HP. Your best choice with no power mods is the Mazda 787B. The LM's have the power, but I think that they weigh substantially more. The TK ZZ-II is another good choice, but if you plan to enter any car in a long series of races, buy the T-2 tires and at least the first two power ups, so that you can remain competitive when the AI gets the "mid-series boost".