  The difference is that a 2wd car will only have two of the four wheels supplied with power to drive, either front wheel drive or rear wheel drive. A car with 4wd will … have power supplied to all four wheels, giving it better driving abilities in wet or slick conditions.wd = four wheel drive. awd = all wheel drive. These two are the same thing. It is a system where all four wheels of the car are connected to the engine and is very good on vehicles used where you need more traction than usual.