Doom could absorb energy in the movie version. However, what sources still remain a mystery. Could he absorb the energy from Iron Man's suit? Perhaps, but in the movie he was shown only absorbing electricity. Also, we are not sure how strong Doom is in the movie, he was strong enough to use a street light as a baseball bat and duke it out with The Thing. But, the winning factor, in my opinion, is that I don't think Iron Man could hurt Doom. Doom withstood falls from tremendous heights, force fields to the face, super nova temperatures, and most likely doesn't need to breathe or eat. I don't see how Tony could hurt Victor in this scenario, especially with the armor he is using. On another note, Tony's MK V armor can't absorb energy, that was pretty apparent when Whiplash's energy whips nearly destroyed the armor.
Doom stomps. Mark V armor is pretty useless. Its pretty much just the repuslors and super strength. Tony really has no way to attack Doom without getting toasted first. Mark II or III would be a better match cuz he'd at least have speed on his side.