Larry 
2017 Nissan Armada SUV SL 4dr SUV 4WD (5.6L 8cyl 7A)
the most room
 A comparison of full size luxury SUVs shows the 2017 Nissan Armada to be the best, especially for comfort and affordability.    I particularly like the driver seat/front console configuration which allows for more room than any of the competition.   It has significant luggage room and great space both in the front and back seat which places this SUV at the top of the luxury list.   It is roomier in the front than any of the others save the Infinity which is its more expensive twin.     Room for improvement include 1) on acceleration  ...the way it is geared causes it to rev a little too much, 2) the headlight adjustment finds the dim lights pointed a little low for my tastes and 3) as a technophobe, I'd prefer better instructions with regard to understanding the electronics.   That said, on the whole, this car, (which uses regular gas) is a delight to own and drive!