Originally Posted by Leonardo629
current gen M3 has always developed similar horsepower to the last gen M5, so using the same logic my best guess is the new M3 should have an output between 480~500, which is easy with a tri-turbo.
Your logic is on with the e39 and e60, but no way @ 500; now you'd be getting into M5/M6 territory. There wasn't that much of an increase with the f10 in HP compared to e60, as there was from the e39 ---> e60. More realistic is 450-475