Sienna vs. Odyssey: Cargo Volume. When it comes to cargo capacity, the 2019 Odyssey outshines the 2018 Sienna. The 2018 Sienna offers 39.1 cubic feet of cargo room behind the third row, 87.1 cubic feet with the third row seats down, and 150 cubic feet with both the second and third-row seats down.
Honda Odyssey vs Toyota Sienna: Interior Specs. Interior space is a big concern when shopping for a new family car, but you won’t have to worry about that with these two minivans. The 2017 Honda Odyssey and the 2017 Toyota Sienna have tons of passenger volume and more than 148 cubic feet of maximum cargo capacity.