X6 SAC (sports activity coupe) background BMW will launch the X6 in 2008. Based on the X5, it will have a tapered roof that will give it a dramatic look. BMW calls the X6 a sport activity coupe or SAC, instead of SAV or SUV. It will simultaneously have a bigger footprint and less passenger/cargo capacity than the X5. There will be two variants: Gasoline engine 4.8-liter V8 producing 450 hp. Two mode hybrid based on the joint research effort among BMW, DaimlerChrysler (while those two were still married, if only for the sake of the children), and General Motors. The gas-engine X6 arrives in 2008. It will be built in the Spartanburg, SC, factory. See this BMW video interview with Chris Bangle to more fully understand BMW's thinking behind the X6: http://www.youtube.com/watch?v=4t3mlzzfTKo While BMW says the design is groundbreaking, others say it's not very space-efficient. Some say the sweeping design emulates Pontiak's bold brushmanship with the Aztek.