Answer: Unless Stark develops anti-Kryptonian technology or synthesized Kryptonian enhanced weaponry in his armor, Superman wins against Iron Man. The real question is hos much time can Iron Man last in an open terrain/urban battle against Superman.
So it wouldn't be much of a surprise that Tony built, or at least could build, an Iron Man suit capable of beating Superman. Most likely, the whole suit is made of Kryptonite, so it would not only beat Superman, but quite possibly kill him.
If Superman had no weaknesses at all, no Avengers would have a chance in front of him. While Superman is known for his incredible strength, speed, and other superhuman abilities, there are a few Avengers who could potentially give him a run for his money.
Superman is significantly faster than Iron Man. Superman's top speed is said to be around the speed of light, while Iron Man's top speed is only around Mach 5. This means that Superman could travel around the world 7.5 times in the time it takes Iron Man to travel around it once.
The two heroes have raced several times since then, in the comics, cartoons and movies. As a general rule, the comics claim that The Flash is the faster hero, with Barry Allen, Wally West and even an octogenarian Jay Garrick having outrun Superman over the years.
When it comes to raw strength, Superman is more likely to outmatch Captain Marvel. Based on how their powers work, Captain Marvel is almost always at maximum capacity with her abilities, whereas Superman can only grow stronger the longer he is under a yellow sun.
To make things clear, Superman has lifted Mjolnir in comic books. In 2003, when Marvel and DC co-produced JLA/Avengers #4 to defeat the ultimate villain Kronos, Superman was able to wield Thor's hammer.
Superman is stronger than Thor and would win a fight against him the majority of the time. Superman has physical strength, speed, and durability as his advantage. That isn't to say that it would be an easy fight, Thor still has access to magic, and this is one of the most notable weaknesses of Superman.
Given his mastery of the magical arts, it would make Doctor Fate a tough opponent for Iron Man, whose technology-based weaponry would be ineffective against his magical defenses. Moreover, with his vast mystical powers and abilities, Doctor Fate could quickly neutralize Tony Stark and take him down in battle.
2 Thor Is Just Too Much For Iron Man
Thor took exception to Iron Man's actions when he found out about them, especially Iron Man's use of a Thor clone, and the two came to blows. Thor beat Iron Man easily.
The Man of Steel can only be defeated by Captain Marvel using energy absorption. Captain Marvel, a Kree-Human hybrid, is a cosmic-level superhero who has overcome even greater challenges. Although Superman truly is the pinnacle of strength, if Captain Marvel can find a way to depower him, it's game over for him.
While Iron Man can certainly hold his own in a fight, if the two were to engage in close-quarters combat, Batman would likely emerge victorious. Batman's physical prowess is formidable, as seen throughout his movies, and only skilled fighters like Deathstroke have been able to defeat him.
This difference in gravity allows Superman to lift objects that measure in the tons. In fact, the comics have put Superman's strength at a point where he's able to lift around 2 billion tons! To put that into perspective, the Empire State Building is only 365,000 tons!
Thanos is a powerful and skilled foe but Superman just outclasses in every way. Just to begin with, Thanos is way, way weaker than Superman. Sure, Superman can't throw planets without breaking a sweat like he used to, but he's still massively strong. Add to that his durability, his amazing speed, his flight, and more.
There's no question the Hulk is a near-indestructible force who comes out on top in almost all of his battles of pure strength. However, against Superman, he's outmatched. While Hulk's strength might rival that of the Man of Steel, Superman's other abilities give him a considerable edge against his opponent.
While the current roster of the Avengers is a pretty formidable group, there's a very good chance Superman is going to be able to run through a good amount of them in short order. However, the Avengers have a whole lot of underrated members they can call on for help and that's going to make a world of difference.
Even though Superman is often considered the most powerful character in the DC Universe, Shazam definitely comes close, and he can even beat the Man of Steel. And with a massive power upgrade, there's no question that Shazam can meet Superman blow for blow—despite the upgrade's terrible side effects.
For most of the fight, Shazam is winning without using the full extent of his powers because of his deep respect for Superman. While Superman ultimately wins, it's only because he's able to cover Batson's mouth.
Superman can fly at a speed of 2.6×107 m/s. A supersonic jet on the planet Krypton can fly at a maximum speed of 130000 m/s.
This super-fast superhero can make thousands of calculations in an instant. Superman can run and think fast, he just doesn't come close to The Flash's top speed. In all instances of racing The Flash, Superman has never bested him, and throughout the entire history of DC comics, these two heroes have drawn twice.