What car has lowest insurance rating for teen drivers?

The short answer is that cars are almost always rated by themselves and drivers are rated by themselves. The two ratings are then combined and additional factors are considered to come up with a final price.

A better question might be, "What car has the lowest (best) insurance rating." That car will probably be the cheapest to insure for teen drivers and older drivers. Of course, teens will pay more for their insurance overall, because car insurance is priced on more than just the car itself. If a driver is considered to be more risky because of the groups the insurance company decides they are in (e.g. teens, drivers with tickets and accidents, males, drivers with poor credit, etc.), they are probably going to pay more.

The links provide information most insurance companies use when setting insurance rates on different cars.