Does the M at the end of BMW X6 M stand for performance Monster?  The 555-HP pulse pounding M edition of the BMW X6 was recently taken out to the track to see if it has earned the coveted M designation. Popular Mechanics had the chance recently to take the BMW X6 M out on the fabled Road Atlanta racetrack recently, and delivers all the details in the 2010 X6

Who is the king of the hill between the V8 sport sedans.  Would you pick the BMW 550i?  Maybe you'd go for the Mercedes-Benz e550, or perhaps the Jaguar XF 5.0.  All are stylish luxury sedans, but how do they handle and perform?  Do you loose the enthusiast if you build too much comfort and effortless performance? The BMW 5 series has aged well, and the BMW 550i remains the choice Continue reading