If you are looking into buying a car, whether new or used, odds are you are looking for a way to finance that purchase. If you are choosing to buy new, your best option would be receiving an auto loan. Auto loans will allow you to make up the difference of what you can afford in cash.
The approval for auto loans are going to depend on your income and your credit. In addition, the better your credit and credit history, the lower your interest rate will be on that particular loan.
Odds are the dealership is not going to offer the best rate on an auto loan, so be sure to shop around and look at multiple different lenders before deciding who you borrow from. You ideally want to find a lender who will give you a great interest rate and one who is flexible; you do not want to get hit with prepayment penalties.
While an auto loan is the most popular way to finance your car purchase, you still want to put as much money down on the car as you possibly can. This will be better for you in the long run and allow you to not be stuck in an auto loan hole of interest.