I’m around 195cm. There is plenty of space. I can fit very comfortably into most vehicles (passenger planes excluded).
Outside of leg and elbow room, what can you even do with that extra space when stuck in a traffic jam?
It's still manageable, and fine for occasional trips, but I wouldn't choose that car to drive 4 adults daily.
Is this a typical thing that cars do? I'm not sure if I've seen 4 adults in a car in the last month.
I do it occasionally for hiking trips and similar with friends. Someone doing this every weekend might want more comfort.