4x4 vs 4wd ?

4x4 and 4wd the same thing ?

yes they are, they do describe the same thing.

here is some info
 
http://www.4x4abc.com/4WD101/4x4.html
 

quote:

ORIGINAL: DavidVIII

yes they are, they do describe the same thing.

here is some info

http://www.4x4abc.com/4WD101/4x4.html

quote:

Even though 4WD and 4x4 are commonly used to indicate the same thing, a 4WD is not necessarily a 4x4.

Those two terms on their own are dated and only ignorance refers to them in this way.
http://www.4x4abc.com/4WD101/4WD-AWD-autoAWD.html <- at the bottom of your article, explains the terms better with up to date terminology.