In DBZ Speed and Power don't really go hand in hand. Ex.
The Ginyu Force (Burter, Reacoome, and Jeice) were all equals in Krillin's word yet each of them brought something to the table and Burter brought the speed showing the he was clearly the fastest.
Goku vs. Captain Ginyu. You could say neither was going all out but I give Ginyu the edge on Goku during the fight and Ginyu said Goku was faster than he was.
Cell said he went all out in the speed department vs Gohan yet still had plenty of power in reserve (imo only using half of it for Goku and Gohan).
At the very least I put Gohan 1.1x stronger than Goku but he was still much faster (Nowadays I go with him being 1.25x stronger).