Insurance is based on several factors. Some are age and experience of the driver where you live, the type of driving you (or learn in school, or just use the joy of work) do the annual mileage, vehicle type, engine capacity, number of doors, and all amendments .
The rate of collision and comprehensive coverage, also on the value of the vehicle is based, it is cheaper, a car for $ 1000 provide that $ 100,000 one. If the car is reached, the insurance would only pay the value of the car, and they have a lower risk with cheaper (older) car.