I have been watching as well and enjoy the show. I have not seen a land anchor before this show and really impressed just how well they dig in because some of those units were buried, impressive.
Maybe it's just me, but I think it's a mistake to equate off road capability to cubic inches or horsepower. I've got two swamp buggies, both powered by 4 cylinders. They definitely wouldn't win at the mud bog races, but they'll go places that would surprise you, and keep on going for days. Given the show's scenario, I'd be much more concerned about weight vs ground pressure, and drivetrain reliability when facing boggy situations.What I can't get over is the Leigh brothers or whaterver their name is, and their POS toyota 4 runner with a wimpy 4 cyl in it.