I have two irish wolfhounds...........the question for me is not where they sit but how much room they will take up........haha........I have a minivan where I have removed the middle and last row of seats so it's just an open space........the female stands in the middle behind the two front seats so she can look out the front window to see where we're going.....the male lays down against the rear hatch until we stop at a light or stop sign.....and then he stands up and looks out the rear window........the look on the peoples faces in the car behind is priceless as he fills up the window.
Use to have a suv but it wasn't as tall inside and when the iw's would stand up their backs would press against the ceiling turning the dome light on and off........after replacing several dead batteries from the dome light being left on I decided a change in dogs or a change in vehicles was necessary......the dogs won out.....haha.......Jack
My dog and I usually take turns driving.