Perhaps the most common question in fan communities: who wins a fair duel — Optimus or Megatron? There's no single answer, because the balance of power differs in every version.
What the classics say
In the classic cartoon their strength is roughly equal, and circumstances often decide the outcome. In the 1986 film the duel ends badly for both: Optimus wins but is mortally wounded by a treacherous shot, while Megatron, thrown into space, is rebuilt by Unicron.
The films
In Michael Bay's films Megatron often won direct clashes through strength and brutality, but Optimus prevailed at decisive moments — thanks to allies, weapons or the Matrix. In Dark of the Moon Optimus finally destroys both Megatron and Sentinel Prime.
Strength versus principles
Prime offers the best explanation: Megatron is the stronger gladiator, Optimus the more enduring warrior who never gives up. Megatron fights to win, Optimus fights to protect. So in a long war the winner isn't who hits harder but who stands longer.
Conclusion
If the question is raw power, Megatron wins more often. If it's the war as a whole, Optimus. That balance is what has carried the franchise for forty years.
