Assuming a ground clearance of 10cm, and a wheelbase of 2.4m (source: my ass) then you can construct an arc under the wheels
This arc says you could drive such a car on an earth with radius as small as 7.25m. Actually, it could be slightly smaller because of where the wheels would contact, but I’ve lost interest
It was actually pretty great when I worked for a company making things here in england:
“That needs to move 50cm” meant it had to move exactly 500mm
“That needs to move a foot” meant just kick it over about a foot
It was just an unspoken thing that metric meant precise and imperial was just caveman measuring