New car loans are available on a term generally up to 5 years with most lenders with limited finance companies making them available up to 7 years. Lenders will normally insist in a secured car finance.
The cost of new car loans is largely dependent on the interest rate and the amount borrowed. Although this might seem obvious, the fact is that this information can be used by you to determine either your monthly car loan repayments, or the length of time over which you want to take the loan. Both of these will be determined by the amount that you feel you can afford to pay each month.