The BMW Concept X4 is a preview of the future of the BMW X family that blends the BMW SAV with a BMW Coupe following the X6 but in a new vehicle class. The BMW X4 has a body length of 183 inches, a width of 75.4 inches and a height of 63.9 inches with 21 inch light alloy wheels. The X4 Sports Activity Coupe production model is scheduled to roll out of the U.S. BMW Spartanburg factory in 2014.