The 2018 Honda Odyssey minivan that broke cover at the Detroit auto show last week has a laundry list of new features: seats that slide every which way, apps for each member of the family to control their experience and a 10-speed transmission. But all-wheel drive didn't make that list. Some expected it to. The Odyssey rides on the same Honda light-truck platform that underpins the Ridgeline pickup and Pilot and Acura MDX crossovers, models that offer awd as an option. Within the Odyssey's own segment, Toyota's current Sienna -- the top-selling minivan in 2015 and 2016 -- sells about 15 percent of its models with optional awd, according to Toyota.