Two Minivans, but completely different in all significant aspects: model year, horsepower, ground shadow size, maximum occupancy, starting price, fuel economy, and height. First of all, the 2016 Ram Promaster City is priced $5,230 lower compared to the base MSRP of the 2013 Honda Odyssey, which is older by three model years. Also, the 2013 Odyssey has bigger and thirstier engine; the 2016 Promaster City gets 2.5 more mpg. In addition, although the Odyssey is significantly larger, it has a slightly shorter body than the Promaster City. And finally, there is a difference in the number of passengers; the Honda Odyssey seats three more the Ram Promaster City. Among similarities is the body structure.