I am 6'4", 210.
I had all the room in the world in my '16 Sonata PHEV Limited since even fully loaded they did not come with a sunroof.
There should be zero hesitancy to just go and sit in a car. I do this all the time when I am thinking about cars because going to sit in them calms me down from thinking about them. For instance, no sense dreaming about being in the Alfa Romeo Guilia because even though I wanted to fit badly, I didn't. I bring my kids along and test cars all the time, have them hop in the back and realize that even if I fit, they won't, especially as they keep growing.
I have the '21 N Line now and it is tight. I fit fine in every dimension but headroom, I am at the limit. I just squeak in. When I wake up and jump in the car with a stiffer back, my hair touches. I can easily make it so my head is jammed into the headliner. I basically settle into a position that is just less than fully upright because otherwise I would be pressed against it. Most of the time, I relax within a few miles making it a bit more comfortable. I can slouch but that isn't great for me unless it is the end of the day and my body is less stiff so I am not sitting as upright. The seats are sized for smaller people as well but the headrest does go up to a nice position and does not dig into my upper back/neck like some cars. The seat length is average, extended bolsters don't usually help taller people since generally have to have the seat slammed to the floor to fit which forces the knees up so while cool in other cars, it is really a useless feature for taller folks. The sunroof is unfortunately not any wider, that would have helped by giving some space. I can fit in the car behind myself, a test I do with any car purchase. I even have headroom in the backseat, I know my hair can still touch the headliner. Even with the seat all the way down, my head is high in this car, my view is just about equal with the rear view mirror. When I jump in the other family car, a VW Atlas SEL R Line, I feel like a tiny person since I can actually center the seat height so my view is about mid way in the windshield, very weird when jumping from one car to another, makes it hard to drive the Sonata for the first few miles until I adjust back.
All that being said, I knew that it was an issue but out of the various cars I tried out that I liked, the N Line headroom was the only compromise and I am living with it fine. I wanted to really like the VW Arteon but it was just a let down while driving although the cabin space in terms of headroom and the large hatch almost won me over. I have definitely hit my head on some larger bumps in the road. I have looked into trying to drop the seat height but I am not comfortable doing that at the moment, too many safety issues with that. The N Line fits me and my family nicely and should for at least several more years as long as I don't trade for the Ioniq6 when that comes out.
I would say, and have previously said in other posts, that I think 6'4" is the limit in this car but feel free to go try it out, every body fits a bit different.
