Is there a difference between normal cars and “4 wheel drives”?
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It refers to which wheels are getting the power from the engine to actually move the car.
It’s complicated and there is no single best answer, but most modern cars are *front wheel* drive meaning only the front two wheels are connected to the engine. An extreme but obvious problem would be what if the car is going off-road and the front wheels are lifted from the ground, it loses all ability to drive. Less extreme examples might be issues like ice or water on the road.
So many cars use either “all wheel” or “4 wheel” drive, both of which mean all 4 wheels are connected to the engine, but are just variations on the specific mechanical design.
The point being cars are very complicated machines and there is rarely a single “this is the absolute best way of doing something”, there are tons of ways each with benefits and liabilities and needs.
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