The M56 is the performance flagship of the 2012 Infiniti M range, which in addition to the M56 also includes the base M37
and mid-spec M35h
Compared to the other two, which come with V-6 engines, the M56 is unique in that it features a V-8 powerplant, which means anyone considering similar V-8 powered luxury sedans such as the BMW 550i or E550 from Mercedes-Benz should also take a look at the Infiniti.
Under the hood sits a 5.6-liter V-8 delivering 420 horsepower and 417 pound-feet of torque. Matched to a sweet seven-speed automatic with paddle shifters, this engine will propel the M56 to 60 mph from rest in 5.0 seconds or less yet is still capable of 25 mpg highway gas mileage. The sound of the exhaust is also one of the most hellacious found in a luxury sedan.
As you may have guessed, the car’s city mileage comes in lower, in this case averaging about 16 mpg. Note, Infiniti also offers an all-wheel-drive M56x. Considering the almost identical fuel...