It was easy with a fully tuned, raced modified Z06(800 something bhp, 1100 kg). Basically my go-to car for the big races so far. For some reason vs the same type of cars in All-Star, the Z06 was barely enough to win(especially at certain track, like Tokyo 246 or Cape Ring). But in Like the Wind it was easy for me to smoke AI by large margin...
I think some used the Furai that you can win in B-spec also, but I have not tried that car yet at all...