That is an awful big difference. Most I have ever seen is like an inch. Measure the car from the front of the rear wheel well and the back of the front wheel well. You know, the flat area of the car at it furthest points from each other. Chances are you are seeing an optical illusion from the fact that the wheel well openings in the front are larger than the rear OR you have some seriously broken suspension parts. Pics would also be helpful.