Multi-car policies don't always offer the best value. In fact, sometimes they can actually be the most expensive option. Our family Admiral multi-car policy covers my wife's and my own car. Our son was also on the policy with his own car that he sold earlier this year. He has now bought another car and so I telephoned Admiral to add him back onto our policy. I was quoted £858 to include him up until the renewal date in October - basically £858 for 6 months' remaining cover. My son decided to run a comparison site check whilst I was calling them. He discovered that the same company quoted him £750 for a brand new policy of his own! Thankfully he let me know before I accepted the telephone quote. So beware! Always check the market before adding a car to a multi-car policy. And after this experience we'll also be checking the market for separate quotes before automatically renewing our multi-car policy.