That looks suspiciously like the range GMC were designing ....
4x4 Commander , 6x6 Captain , 8x8 Colonel & 10x10 General (all were fully amphibious) ...
They didn't really think that set of names through, did they?
"Well I'm just going to get into my Colonel now.."
"Help, my General's upside down in a ditch!"
"Can you fill my Captain up please?"
"My Commander needs a new spare tire."
Etc, etc......