It would have to be at least a 20hp (15kW) motor to get near 90cfm at 100psi. So many air compressor manufactures embellish their cfm ratings…. It’s pretty well impossible to get more than 4cfm/hp@100psi from an air compressor, especially if it’s a single stage. If it’s two stage and has intercooling, then over 4cfm/hp @100psi is possible. Oh, and what is the elevation the compressor is operating at?
That would be pretty impressive if folks have a 20hp compressor in their garage!!