Any vehicle dynamics control engineer would agree that -

27% hill is steep. If you have friends in this field, please check with them. Most common drivers have false perception when they are on a hill, thinking that it is steep, but really its slope % is not that high. If the slope in the video is truly 27% as they claimed, then it definitely is a steep hill.

Actually, I was not going to say this. To people who work in this field, the cars in the video do not have much performance difference when they climb up that hill. It is just appeared to be dramatically different to common drivers.

Nevertheless, none of these cars are good off-road vehicles.