At approx. 2:15 AM I was out on the back porch of our villa smoking a cigarette. I have a clear view to the east toward Hazza Bin Zayed Stadium. Something caught my eye. The moon was near full so the visibility was good for night. As I focused in on the object it was clear that the object appeared to be large, like a full sized car, and silver color such as aluminum looking. The object appeared to be below 1000 ft in altitude and traveling between 200 and 400 MPH due north in a straight line. The part that really baffles me is there was no sound emitted as it passed by me. The object looked to be within 200 meters from my location moving from my right to left and was completely out of sight in approximately 4 seconds. There were no lights visible on the object.