It'* low volume, high pressure. It should be capable of about 70psi.
You can increase it'* efficiency with a little maintenance, and it probably needs it. Remove the small screws on the top of the pump cylinder cover, and expose the piston. Use some light oil (not WD-40). Air tool oil is ideal. Put about a teaspoon in there right on top of the piston and button it up again. It'll re-lube and seal the rings.
You should do this about once a year considering the age of your compressor. It'll also make a noticable difference, and that oil in the system will be good for conditioning your rear ELC struts. Not to mention the rubber o-ring seals at every connection point.