Personal loans and car loans are useful for different purposes, as their names suggest. You can essentially use a personal loan however you like, while car loans are designed to pay for the cost of your car specifically. However, as demonstrated above, car loans come with much higher potential borrowing ranges, extending well beyond $100,000 in some cases, while unsecured personal loans are unlikely to exceed $75,000 in any circumstances.
Their rates and fees are also higher, which reflects the increased risk lenders take on by approving them. Unsecured loans may be useful if you're buying an old or damaged vehicle, but secured loans are likely to save you money on car finance in almost all circumstances.