All my fly rods are 4-piece. When broken down and in their tubes, they fit nicely into the upper cabinet in the back of my 19. I usually stuff my fishing vest or other clothing in with them to keep them from rolling around.
When they are set up and ready to fish, this has always presented a problem regardless of what vehicle I'm using. I finally bought those rod holders with suction cups that go on your windshield a few years ago. Right now I'm considering the long metal tubes that affix to a rack on the roof of your vehicle, like this:
https://www.amazon.com/River-Smith-2...g-goods&sr=1-9