Probably your credit report. The information you mention is what would be on you...

sneak · on July 11, 2013

I have never financed a car yet my auto ownership history is in these databases.

I think they buy them in bulk from state DMVs.

jlgaddis · on July 12, 2013

I think the GP is correct. One such question is something similar to:

"You may have opened an auto loan in January 2010. If so, how much is/was the monthly payment?

A. $0-99 B. $100-299 C. $300-499 D. $500+ E. I did not open an automobile loan in January 2010."

Information like that could certainly be obtained from your credit report but I doubt the DMV knows how much my car payment was.