Recently I got into an argument on IGCD about the Landstalker. I think it's most likely based on the Jeep Grand Cherokee (WJ). I think it would make sense, as it was partially based on a Jeep in Vice City, San Andreas and Vice City Stories. And also, the script implies that it's a Jeep: It refers to the Landstalker as 4X4, and in GTA 1 the 4X4 was a Wrangler.
The script: http://gtamodding.ru/wiki/Kenji#kenji2(scroll down to the "end of the custscene" part)
However, if you look at the page, you can see that only a few people agreed with me, despite the comparison pictures:
So, I would like to hear your opinions: which SUV is the Landstalker based on?