1.35 CFM isn't enough to keep up with air tools even with a 2 gal. tank. You will only get a few seconds of air for them. You would be better off running a smaller tank, such as the 1/2 gal. tank suggested by Frenchie, and buying a battery powered impact wrench. The problem with larger tanks was mentioned earlier - the additional volume is the equivalent of another tire or two, depending on size, so that you are effectively filling 5-6 tires rather than 4 every time you air up - however the larger tank still isn't enough to store enough air to fill a tire. A smaller tank will store enough air for an air horn and provide the necessary buffer to reduce stress on your compressor at start up and allow the use of an on/off pressure switch.
Hadley sells a 1/2 gal. tank, P/N H00626, that measures 5" x 7" (pictured below) and also a 1 gal. tank, P/N H00751N, that measures 5" x 14". I have owned both, The Hadley 1 gal. tank came with an 12v onboard air kit sold by Curry Enterprises in the late 1990's and was mounted in my jeep. It was plenty for my 35" tires and air horn. I acquired the 1/2 gal. tank used from an RV bone yard. It is now mounted underneath my Xterra - the only tank I could find that would fit the available space - and is plenty for 33" tires and air horn.