Stock 2dr BL: I'll be happy with and expecting to get 20ish when on regular dirt roads/2-tracks. Not-hard core off-roading but those 30-60 mph open trails. With an extra 5g of gas on hand, that would be over a 400 mile range which is what I always plan on minimum. My Bronco Sport BL gets 27-30 on these trails above even the highway epa figures.
My Mustang GT with a V8 got 21 in mixed town driving.
Wife's Expedition with the 5.4 gets 17.5 in mixed town driving.
New F-150 Crew Cab with the 2.7 gets just over 20.
4-banger Eccoboost with the stick shift damn well better get at least 21 or 22, especially with the tiny little fuel tank Ford it putting in them. Even with the steeper gearing, the Bronco is a LOT lighter than either the Expy or the F-150
Hint for those ordering an automatic - in mixed to heavy traffic, the F-150 with the 2.7 actually gets better mileage in Sport mode. Sport keeps it in lower gears, so the turbo doesn't spool as much. Ford's downshifting in standard modes are not nearly aggressive enough.
20 hwy would make me happy, 17 would be acceptable. Don't care about city mileage, even though it's the bulk of my driving it's still such a small number of miles that I only fill up about once a month now. It's the out of town trips that I feel the fuel pinch.