> You don't own the vehicle if you have a loan, the bank has the title. The title holder is the owner.

No, the listed owner on the title is the owner, no matter who has possession of the title.

"Loan" sounds so generic to me that what you're saying may or may not be true in different places.

I'm sure that somewhere has crazy rules but the general idea of a secured loan is the lender can easily take your security if you don't pay the debt. If not for that it isn't secured, is it?

Car loans are secured on a car. If you want to just borrow money with no security you can get a (likely far more expensive) unsecured loan if the bank judges this to be a good risk, or take an overdraft on a current account or use a credit card, all unsecured debt.

Collaterals don't require ownership by bank where I live. Loaned cars are owned by their loaners (but leased cars aren't, although they may transfer ownership to the leaser after a period of time, depending on the terms of the lease). Not sure how these things work in the UK, though.