I completed the Japanese 90's challenge using a stock '98 Mazda Roadster 1.8 RS. It was tough, but I did it.
You must be a driving god, then. :)
I have used my rx-7 to win this race.
You may as well use the Nissan skyline gtr
Try an Evo IV, but buy it in white.
Otherwise, if you want to stay close to the PP limit, buy an Efini RX-7 from 1991, but choose yellow as the color. Then, tune the car to make sure it's super close to the PP limit.