More weight may mean more power but it's required to move the added weight at the same speed as a lighter guy with less power. A 250 hp car that weighs 2500 lbs will outrun a 350 hp car that weighs 4500 lbs.

More power isn't the answer, it's the power to weight ratio. I'm 6ft and 206 and like to lift weights. I can put a decent amount of power to pedals for a while but I'm still moving 220+ lbs when I'm on my bike as opposed to a guy maybe not quite as strong moving 145 lbs. He's gonna smoke me and badly.