What Is the Difference between 4 Wheel Drive and All Wheel Drive?

Answer

The difference between 4 wheel drive and all wheel drive is that 4 wheel drive (4WD) is a system which powers all the four wheels or two wheels because the driver has an option to use either while in all four wheels, the system is engaged in the driving process permanently and the driver has no option to disengage the system. In essence, the two systems almost perform in the same way.
1 Additional Answer
The difference between an all wheel drive and 4 wheel drive is that all wheel drive is permanently available to the car and does not need to be separately engaged via the use of a low ratio gearbox. 4 wheel drive on the other hand is not always permanent and has to be engaged through the use of locked differentials and a separate low ratio gearbox. Example of an all wheel drive car is a Subaru Impreza Wrx and a 4 wheel drive car is a Land Rover Defender.
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Basically, a vehicle with 4 Wheel Drive (4WD or 4x4) means that are 4 wheels are simultaneously receiving torque to them, making all 4 of the wheels turn at the same time. There is
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Vehicles powered by 4WD at all times are equipped with two drive settings, described by 4x4 ABC as 4WD high and 4WD low. When the 4WD low setting is engaged the vehicle is slowed
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a 4 wheel drive vehicle has the options of engaging 2 or 4 wheel drive when you need 4 wheel drive.for example to get out of mud . all wheel drive means that all wheels constantly
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