Earlier this year, Car & Driver squeezed out 4.1 seconds from zero to 60 miles per hour (97 kilometers per hour) from the M550i xDrive. That’s a little slow for the M Performance-branded luxury sedan, ...

While the current turbocharged four-cylinder and six-cylinder engines are reportedly being carried over to the next generation, this is less likely for the twin-turbo 4.4-liter V8 found in M550i ...