Hmm, I have a passing familiarity with most 80’s era robot toys but this one doesn’t strike me as Voltron. Not quite old enough for a Diaclone either I think, a lot of those existed that didn’t get imported to the USA as Transformers. Decals are too detailed and the hands hinge, which was more of a 90’s thing.

Power Rangers zord maybe? That face is definately more their style, and goodness knows how many iterations that universe had. :P

Annnd posted too soon - found it! It's a Power Rangers Lightspeed Rescue Train.

https://www.youtube.com/watch?v=LWul_nE_-tc