Did you say "Dot Matrix Printer for fast printouts"?
Maybe they have gotten faster but my 'Roland Raven" (from the late 80's) dot matrix takes about 4-5 minutes for a 8.5"x11". Also the paper has to be perfectly aligned on the rollers (the paper with the wholes), or it will jam up, so I can imagine in the car that would be no good.
They make those small laser printer things. The are pretty much the same size as a can of pringles. Then you put in a sheet and out it comes printed. Might be better than a dot matrix.
