Definitely not the HP 80 or 81, as they don't have an IRR function.

At this point I couldn't even recommend them for TVM calculations, as they don't have dedicated TVM registers, but instead depends on the user entering the information in the correct order. In other words, if you press the sequence "3 N 4 i 5 PV", you end up with the 3, 4, and 5 on the stack. The order in which you use the TVM keys just tells it which TVM calculation (out of a limited set) you're trying to compute. And if you do calculations on the stack in the process, you can push your TVM values out.

The HP-70, HP-22, and HP-27 have dedicated TVM registers, but do not use the modern five-variable TVM with signed cash flow direction.

The modern TVM was first introduced in the HP-92 (desktop printing),

and used in the 37E, 38E/C, 12C, and all of the newer (Saturn and post-Saturn) models.