BMW M3, M4 engine note teased

The engine note that will be emitted from both the new� BMW� M3 sedan and M4 coupe has been teased in a clip released by the carmaker�??s M Division. The brief clip shows a �??tuner�?? �?" or rather, a model wearing glasses �?" working on a laptop in front of the new performance car. The engine is revved in front of him several times before the car drives off. When it was first