There is NO WAY a 120 V unit will handle the demands of any serious air tools. Die grinders, dual action sanders, air files, air nibblers all draw a lot of air and REQUIRE at least a 5 HP 220v air compressor.
A lot of 120v air compressors will claim some wild HP numbers but simply put at 120v and a standard 15 amp outlet the maximum sustainable 2 HP. A 2 HP compressor does not produce the cfm necessary to run most automotive shop tools. Air tools used in construction like finish nailers and framing nailers simply don't use very much air. A single die grinder can use 6-8 CFM at 90 PSI.
I know you want portable, but this compressor is only a few dollars more and yet runs on 220v and will easily provide the CFM you're looking for:
http://www.tractorsupply.com/campbell-hausfeld-reg-60-gallon-cast-iron-air-compressor-3310006
Regards,
Joe Dokes
