A good Porsche loan rate starts with the fact that loan rates are generally higher for high-end cars than for lower-end ones. Then, you should evaluate your creditworthiness and the terms of the Porsche loan you're interested in to find a good one. In general, you can expect to get a better rate on a Porsche loan if you have a good credit score and can afford to put down more cash as a down payment. You can also get a better deal on a Porsche car loan if you have income that's above the asset threshold. Finally, you may be able to get a more favorable interest rate on a Porsche loan if you have excellent or very good credit above 700 points or higher and can make sizable monthly payments.