Ignition was more than a match for Superman, so from a physcial standpoint Tony doesn't have a prayer. However, Ignition never displayed an immunity to the technopathy Tony brings to the table.
That said, Tony ftw 7-8/10 (giving Ignition a few wins just because of his physical prowess.)
Don't forget his unholy blast power. He was able to one-shot Superboy and Supergirl at the same time. I think Iron Man is going to have to stay mobile if he doesn't want to die.
__________________
“Where the longleaf pines are whispering
to him who loved them so.
Where the faint murmurs now dwindling
echo o’er tide and shore."
-A Grave Epitaph in Santa Rosa County, Florida; I wish I could remember the man's name.
^ Tony's got insane force-fields + he is likely faster/more agile than Ignition + he can become invisible/intangible + he's got high-level technopathy, etc. Tbh, I can't think of many ways Ignition can win, all things considered.