If I understand what you're asking, I don't really think that such is the case. There are a number of factors than go into your "maximum output," and I think cardiovascular health is at the top of the list, regardless of overall weight.
I have a real world example of this to support my view. One time, my cousin and I went out for a bike ride together. We are exactly the same height, but he was about 20kg heavier than I was and had very strong legs. Despite being objectively heavier, he was much healthier at the time than I was, and this was made abundantly clear when we decided to race and he left me in the dust.
Cardiovascular health and leg strength relative to your bodyweight are going to make the biggest difference.