The full form of 4WD is Four Wheel Drive(FWD)

Four-wheel drive, also called 4×4 (“four by four”) or 4WD, refers to a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case providing an additional output drive shaft and, in many instances, additional gear ranges.

A four-wheel drive vehicle with torque supplied to both axles is described as “all-wheel drive” (AWD). However, “four-wheel drive” typically refers to a set of specific components and functions, and intended off-road application, which generally complies with modern use of the terminology.

At one time, if you wanted a vehicle with four driven wheels, you were limited to just a handful of large trucks and full-size SUVs, most of which were used for work chores or off-road adventure. But times have changed. Now over 50% of new vehicles sold in the U.S. are equipped with either all-wheel drive (AWD) or four-wheel drive (4WD), according to Jato Dynamics, a London-based automotive intelligence firm.

So the popularity of vehicles that can send power to both the front and rear wheels is indisputable. But what’s the difference between AWD and 4WD? And which is right for you? AWD vs. 4WD terminology can sometimes be confusing, especially since AWD systems have become more robust and 4WD has gotten more sophisticated, blurring the distinction between the two. Adding to the confusion, various manufacturers often use these terms differently.