And while it truly depends on the writers, the general consensus is that Wonder Woman and Shazam are equally fast due to both being blessed by gods of speed.
Shazam can fly at the speed of light, which makes him faster than almost any other hero, but both Barry Allen and Wally West are able to move at speeds faster than light, meaning that while they would have to push themselves, at least two Flashes are faster than Shazam.
In fact, the Flash himself has said she can keep up with him at his regular cruising speed. However, she can't touch Flash's top speed. And as fast as her reflexes are, Flash's are faster. This one is another no-brainer- the Flash is infinitely faster than Wonder Woman.
As far as I know, Shazam is considered roughly an equal to Superman in power level. In the other hand, Wonder Woman tends to be depicted as less powerful physically than Superman.
Superman would win in a fight against Shazam. Superman is stronger, faster, and more durable. The only thing that Shazam has going for him is that his powers and abilities are magic based, which would give him a huge advantage, but it wouldn't be able to deal with Superman's might.
Superman is Superman. He is going to be on every list that ranks superheroes by speed, strength, durability, endurance, etc. You name it, he's on it. Of course, Superman is much, much faster than a regular old bullet.
Generally, the Speed of Mercury allows Shazam to move “as fast as bolts of lightning.” The average speed of lightning is 270,000 mph (according to the first google result at least), which means that Shazam can easily reach speeds of 270,000 mph.
It may seem strange, but despite his reliance on lightning for his power, Billy is highly susceptible to electricity. This means that if he is hit with a powerful enough blast of electricity, Shazam will be transformed back into Billy Batson.
Thor, being a god himself, surpasses the power levels of the individual gods Shazam draws his abilities from. Therefore, Thor's divine heritage, his godlike power, and his mastery of Mjolnir provide him with the necessary advantage to defeat Shazam in battle.
But even that will only get him so far. In fact, in Alex Ross' Kingdom Come graphic novel, Shazam was brainwashed by Lex Luthor. Superman was the only hero in the entire Justice League even remotely strong enough to defeat him — but just barely.
Wonder Woman can also run and fly incredibly fast with speeds reaching hypersonic levels around 3,806-7,680 mph or more, but even she starts to pale in comparison when we look at the previously mentioned raw speed of Superman.
Ra's al Ghul is one of the most dangerous immortals in the DC Universe and while he and Wonder Woman have rarely crossed paths, he was able to take her down the one time she faced him and his forces on her own.
Wonder Woman aka Diana Prince is capable of reaching speeds faster than light, and is without a doubt one of the fastest people in the DC universe. Her most ridiculous feat is blocking trillions upon trillions of pieces of the Shattered God, coming from all corners of the universe.
Shazam's top competitors include Smule, Deezer, and SoundHound. Smule provides a music application. The platform allows users to create, and share musical content. It also enables users to participate in different music competitions…
DC Universe (2008), using the character's original name, Captain Marvel. Shazam's Super Move, "The Power of SHAZAM", deals 39% damage, making it (along with the Flash's "Speed Zone") the strongest in the game. Shazam is a teen as Billy Batson, making him the youngest playable fighter by far.
Shazam's abilities were derived from the powers of each of the old greek gods. One of the powers that he acquired was the super speed and ability of flight that Hermes/Mercury, the god of messengers, have. This is why he can fly and run as fast as superman.
Superman killed Shazam because the latter opposed his plan of destroying Gotham City to set an example to Batman and the other heroes that fought him in the Injustice storyline. When Superman got tired of Shazam's opposition, he swiftly killed him by freezing his mouth and using heat vision.
Originally, Shazam was a powerful wizard of ancient Egyptian/Canaanite origin whose birth name was Jebediah. As a child, he was bestowed the powers of Gods of Canaanite origin and was referred to as simply the Champion, growing up to becoming an ancient hero and keeper of the Rock of Eternity.
In Kingdom Come, Shazam strikes Superman with repeated magical lightning bolts, bringing the Man of Steel to near-death. Superman manages to end the fight before Shazam can kill him, but the damage was done and Shazam walked away the victor.
He can overcome tremendous physical resistance. This superhuman ability lends to his ability to stay as Captain Marvel for elongated periods of time, survive in space and fight seemingly endless battles such as his fight with the Spectre or Black Adam. Is Zachary Levi's portrayal of Shazam comic accurate?
Bullets have no effect on Billy, and conventional weaponry does nothing to his physical body as well. Only the most powerful of superhumans can topple him. He withstood a punch from an enraged Superman without any noticeable pain and injury afterwards.
While the young family of superheroes had handily defeated threats like Doctor Sivana and Black Adam in the past, Scarecrow's fear toxin reveals that Billy has a deep fear that his decision to share his powers with his siblings will ultimately make him responsible when the family finds themselves in over their heads.
Both Thor and Shazam has speed. But when it comes to fight Thor will win.
Strength. Shazam gets his immense god-like strength from the demigod Hercules who is widely known for his numerous feats of strength. By invoking Hercules's power, Shazam can lift over 100 tons.
Iron Man is one of Marvel's biggest icons. Despite this, Shazam would undoubtedly beat Iron Man in a fight. There's not a lot that Iron Man could do in his base suit to hurt Shazam. Iron Man likely wouldn't be able to think of a way to beat Shazam, as magic is outside of his wheelhouse.