Tony Stark has made a numerous suits for each specific occasion. One of them is the ‘Hulkbuster’: it’s not actually a suit per say but an “ecoskeleton” that Tony can pull over the armor he wears regularly. The Hulkbuster gave Tony many advantages such as special radiation detectors which were of help when it came to tracking Hulk’s gamma rays and a magno-hydraulic frame that could double Tony’s strength.
The ‘Thorbuster’ is also an ecoskeleton overfitting Iron Man’s armor but this time it’s meant to actually reduce his speed and maneuverability as to make him stronger and better protected against the god of thunder. Tony used a mystic jewel, that was once found by Thor, in order to create the suit and it happened to be the only time magic was involved in the making of any Iron Man armor. This suit in particular was designed to absorb Thor’s lightning and strike him back with it. However, the suit was clearly not one of Tony’s great works as Thor was able to rip it off and destroy it.