Depends how you want to finance it.
At dealerships you get the choice of PCP or Hire purchase (can’t quite remember the name)
Both of those you get an APR rate and how much you pay per month depends on which method you choose, how long you want to repay for and the deposit. With PCP you pay less per month but towards the end would have a balloon payment in order for the car to be yours. The other one there’s you pay a bit more a month but there’s no balloon payment and the car is yours at the end of the contract.
You can whittle down the APR sometimes. Never take the first offer they give you, try and barter. For these options, the dealership sets up the finance agreement and it just comes out monthly as a direct debit. I always go with HP across 4 years to keep repayment down and because my cars last ages since I don’t drive much.
You could get a bank loan- pay the car off using the loan and repay it direct to the bank. You could also use a 0% APR credit card to buy the car and you just pay the bank direct. These are usually the cheapest way