Insurer's rate cars on a scale depending on several factors such as purchase price, ease of repair, likelihood of being stolen, engine size, cost of parts etc. A Fiat Panda would be insurance group 1 whilst a Porsche will be at the other end of the scale. The differences in premium between bands are large and are worth considering when changing your car. You can find out what insurance group your car is by visiting Parkers.co.uk.