As promised, here's a comparison photo. The gun on the top is my 2141 3/4" gun, the middle is the IR 2190, and the bottom is the IR 285.
Claimed output is as follows:
2141 - 1200ft/lb
2190 - 1600ft/lb
285 - 1450ft/lb
Our shop runs around 150-160psi on our 1/2" lines and I'd rate the actual output of the guns as follows:
2141 - 950-1000ft/lb
2190 - 1000-1100ft/lb
285 - 1600ft/lb or so
For stuff like truck tires the 2190 is great, easy to manhandle around, and hard to overtorque studs because the socket stops spinning at around 525ft/lb, but we occasionally have to grab the 285 to take care of the occasional lugnut that the 2190 won't take off. It's really more of a 3/4"+ gun than a 1" gun and if you look at the picture, you can see that it just doesn't have the body size that the 285 has or the anvil size, and thus the torque. For undercarriages on something D-5 sized or so, it might be a bit undersized, and for sure it's undersized if you are in the D-7 or D-8 territory.
I'd rather have an IR 285 or a CP 797 that puts out a true 1400ft/lb than a 2190 that significantly overstates it's output at 1600ft/lb. If that 293 isn't working out on some of your stuff, you'd be sorely disappointed with the 2190, and it might be time to take some serious looks at the #5 spline stuff out there.