Brutal Motor Works; BMW puts everything it knows in one car.

Byline: KEVIN A. WILSON What if Mike Tyson was a gentleman? What if he was gracious and polite and endearing outside the ring but packed the same vicious streak at the flip of a switch? Ain't gonna happen. But you can have Jaguar XK sophistication and Dodge Viper brutality in a single car. The BMW M6 has multiple personalities, but it's no disorder-Munich did it deliberately. Consider the seven-speed sequential manual gearbox has no less than 11 separate programs-including launch control-in its electronic brain. Or that a press of the M button changes the 5.0-liter V10 from a ...