Akira smashes them both into the ground. His size and durability EOS are too high for either stand to contend with. Kenshiro would also have a chance if he got Musou Tensei off.
Not since this was bumped. In short Akira was as strong as Takeshi, stronger in fact. Just by Stamping his foot, Takeshi sent an "11" richter quake through the earth. When they clashed, they cracked Japan. Eventually their strength was so great that the planet was about to explode. To stabilize the planet, Akira dove into the core of the earth and stabilized it by striking it. The only people from even Toriko that could likely beat him are the 3 Disciples of Acacia and Dark Chef Joa. That is not accounting for the 8 Gourmet Kings and Nitro who are in the shadows right now.