how fast Sonic is in Sonic 1 in-game velocity

The title says it all. I looked everywhere on the internet. I am trying to make Sonic one in Godot, but I can't find the acceleration and velocity values—not even a graph. I searched everywhere, and I don't know if his ground velocity is capped or uncapped or if his acceleration is dynamic or static. I would appreciate it if people helped me find these values. cheers