You need to consider how much money you want to spend on a car, how urgently you need it and how much of your savings you are willing to part with in order to fund it.
As we have discussed, car finance loans are not the only way to secure money for a car, so you need to assess all your options and make sure you chose the one which is best for you and your financial situation.
Perhaps a credit card might be a better option to help finance your car? Or, if you need to buy a car quickly, a personal loan?
You must also be aware that when taking out any loan you will be paying interest on what you owe, meaning that the final price you pay for the car will be more than its listed sale price.