The all new 2012 BMW M6 convertible is spied while making test runs in cold wintry whether of Germany. The "BMW M6 convertible "will generate 555 bhp power and 550 lb-ft of torque. Experts believe carbon fiber is what BMW has used to give M6 a super strong bodyThe M6 will eschew the V-10 engine that powered the current car, likely for the 555-horsepower twin-turbocharged 4.4-liter V-8 in the X5 M