I noticed something like this once, but very different.
I won the toyota gt one racecar and went to check the possible power output and it wasnt able to get anything going.
I ditched it and loaded from the last race, skipped and got a different prize car.
About a day or so later I won a different series and got the gt one again.
This time I checked it again only it could take a stage four turbo with 1350 hp (roughly)
I kept that one, but it came across as odd to me.
Did anyone else get that from the gt one?