[Blackbirdws6]

I'm not aware of an age limit. They may have some internal policy (discretionary) depending on how old you are, general appearance and type of car you want to drive. When I was in my late teens, I didn't have a problem testing plenty of fun or even more expensive cars. My usual line used was "how do I know if I want to buy it if I can't drive it?". Nobody wants a joy rider so if you present yourself well, it shouldn't be an issue.