Compare the car price and the financing separately.
Request an itemized out-the-door price, then subtract the down payment and any positive trade-in equity. Identify taxes, dealer fees and optional products separately. A service contract added to the balance costs its purchase price plus the interest charged to finance it.
If the trade-in is worth less than the existing loan payoff, the difference is negative equity. Rolling that gap into a new loan increases the new balance. Ask the dealer to show both the old payoff and trade-in allowance so the shortfall is visible.
Understand how principal and interest change across the payment schedule and how early payoff works.
This is a different transaction using an existing vehicle for cash; it is not ordinary purchase financing.
If considering a personal loan for a vehicle, compare its permitted uses, collateral terms and full cost with car financing.
Comparing written offers can show how the rate, term and fees differ. Use the same vehicle and financed amount, and keep any purchase incentives or optional products visible in the comparison.
The unpaid gap becomes part of the new borrowing. You then pay interest on a larger balance, potentially owing more than the replacement car is worth. Compare paying the gap separately or postponing the transaction.
BorrowCompass provides a guide to this topic at auto loan amount borrowed vs total repaid. Review current provider terms before making a borrowing decision. BorrowCompass does not issue loans or guarantee approval.