In Grand Theft Auto IV the vehicles are once again the heart and soul of the game (how could it be different with this name?). They will be much more realistic this time. You have the opportunity to use navigation systems (with or without voice). If you prefer to search for your destination - that is still possible too. The drive-by-shooting has also been improved: first of all, you have to break the window to shoot out of the car. But then it is possible to shoot in all directions, which makes it much more dynamic than in previous titles.
Now a short list of vehicles in GTA IV: