A Swedish couple drove all the way to India and Vietnamin a Saab 900 with a Toppola... several times. It’s been covered on Jalopnik before, but here’s their own site.

Something that breaks down a lot, thereby enabling me to meet lots of interesting people and garagistes.

Someone else’s.

How about 1980s Skyline GTR? Or Datsuns?

Of vehicles I can actually afford, this would be my choice. My wife has a ‘19, last fall we drove it a 1000 miles to new mexico, air down the tires and drove it up the most challenging trails we could find for a week then aired up the tires and drove it home. No problems, and just as comfortable at doing 80 mph down…

“In that case, what about a Fiat Panda?”

During a round-the-world trip SOMETHING will go wrong, so you need a vehicle that is easy to fix, parts are readily available, and doesn’t cost an-arm-and-a-leg to repair.  A “generic” Toyota (Corolla), VW (Golf), or any of their derivatives.

they were the first people I thought of when I saw the QOTD, been following their stories since the early 90's. Of course if you didn’t have to live out of the vehicle something smaller would be a lot more convenient.

Anything the rental car company will give you and take back without asking a lot of questions.

Fiat 124/SEAT/Lada anywhere outside of North America. Ubiquitous, cheap, and every village has a mechanic that knows how to keep one running with baling wire and duct tape.

You never know what nuclear mutants, cannibals or republicans you might come across so it’s best to be prepared.

To the people saying Land Cruiser you aren’t wrong but for a ultra long trip like this I bring you the LX570 the same vehicle, reliably and off road capability in a even more luxurious package.

https://turtleexpedition.com/vehicles/turtle-v/

Both the Lan Rover and the Silver Shadow are excellent choices, pretty much anything these people come up with would do nicely as well.

U N I M O G

Toyota Hilux with a shell over the bed. Damn near bullet proof. If needed you could find parts for it pretty much anywhere. If you get into trouble in a seedy part of the world, put a machine gun on top and blend in with the local warlords.

Mitsubishi Delica.

A “Holy Grail” Jeep cobbled together from 2 “parts cars” by David Tracy. There is no other correct answer.

2006 Jeep Wrangler Unlimited Rubicon

Already did it in a 2001 Jeep Cherokee, 2012 -2013.