Probably the question is what did you have in mind (not trying to be rude, just put it into perspective)?
Car finance rates right now are around 8.6+++ - saw a dealer do 10% the other day for a full doc lawyer on 200k a year. Which we cut to 9.2% and lower payments as well. Go to the bank, and a personal loan is up around 11-15% (thats full doc too)
But in saying that, often the rate often cant be construed as a factor the same as a home loan different funders calculate the payments differently. So while with one you get a higher rate the repayment is actually lower than another. Then you have issues if its a new car, used, dealer sale, private sale.... and if that then fits the boxes
So a low doc by nature statistically carries more risk and defaults, hence the higher rate.
And getting financials to the point where they can support a full doc would probably be better.
All this being said... isn't a car (if it isnt earning you money) nothing but a liability at the end of the day.