Who hits hardest in UFC history?

Francis Ngannou is widely considered the hardest hitter in UFC history. He was officially measured by UFC Performance Institute scientists and recorded the hardest punch ever measured in their testing, generating over 129,000 units of force, equivalent to about 96 horsepower. His knockout power was described as being hit by a Ford Escort at full speed. He finished fighters like Alistair Overeem, Junior dos Santos, and Stipe Miocic with terrifying one-shot knockouts that cemented his reputation. Other names often mentioned include Derrick Lewis, who holds the UFC record for most heavyweight knockouts, and Shane Carwin, who was similarly feared for his one-punch finishing ability during his era.