The 2011 Infiniti M officially goes on sale next month, and in addition to boasting higher performance numbers and a sleek new exterior design, the EPA has officially released some relatively impressive fuel economy numbers for the new sedan. Both the six- and eight-cylinder Ms benefit from technologies like continuously variable valve timing, and the M56's 5.6-liter V8 uses direct injection to aid in better performance as well as improved efficiency.
The base M37 with Infiniti's 3.7-liter V6 produces 330 horsepower and 270 pound-feet of torque, and nets 18/26 miles per gallon (city/highway). This represents power increases of 27 hp and eight lb-ft versus the outgoing M35 model, as well as one more mpg in both driving cycles. The all-wheel-drive M37x is rated at 17/24 mpg, increases of one and two mpg over the M35x, respectively.
V8-powered M56s use an all-new 5.6-liter engine, good for 420 hp and 417 lb-ft–meaning the grandaddy M produces a whopping 95 hp and 81 lb-ft more than the previous M45. Rear-drive M56s net 16/25 mpg city/hwy, and the all-wheel drive M56x is rated at 16/23 mpg. Even though this engine is substantially more powerful than the old 4.5-liter V8, Infiniti has still managed to improve overall fuel economy.
By comparison, the Mercedes-Benz E-Class is less powerful in both V6 and V8 variants while netting roughly the same fuel economy numbers. If Infiniti can keep the new sedan's price down, consumers in this segment will be smart to add the M to their shopping lists. Click through the jump to read Infiniti's official press release.