My wife and I had a similar question over the weekend, as we were bringing home a tree and had to measure the trees and the car, resulting in an amusing scene where were measuring all the trees in the nursery for height.
The answer is...it depends. With the 2nd and 3rd rows folded down, I could fit an 80ish inch object behind the passenger seat. It was more like 75 on the driver’s side by my measurements, but I sit pretty far back. Other users here have reported around 80” behind the front row.
Could I squeeze an 80” door in there, probably. Could I do it with the door in the box, not so sure. You’ve got to account for packaging. The only way to be sure with ANY enclosed vehicle is to measure your vehicle with the seats as far forward as you can safely drive it, and measure the door as packaged before buying, because measurements can change based on front seat position.
This would be helped if manufacturers specified such lengths rather than only publishing cubic feet measurements.