• Feb 17th 2010 at 6:01PM
  • 51
2011 Infiniti M – Click above for high-res image gallery

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.

[Source: Infiniti]

Show full PR text

Infiniti Announces Official EPA Mileage Estimates for All-New 2011 Infiniti M37 and M56 Performance Luxury Sedans

New Larger, More Powerful V6 and V8 Engines Produce Improved Fuel Economy Numbers

Infiniti today released official Environmental Protection Agency (EPA) fuel economy estimates for the 2011 Infiniti M performance luxury sedan, showing increases of up to four miles per gallon versus 2010 M models. The new generation M's all-new design includes two new powerplants, a 3.7-liter V6 and 5.6-liter V8, each offering more horsepower and torque than the previous smaller displacement designs.

The 2011 Infiniti M horsepower, torque, fuel economy figures, and increases compared to the previous generation models, are:

MY 2011
Horsepower (hp)
330 (+27)
330 (+27)
420 (+95)
420 (+95)
Torque (lb-ft)
270 (+8)
270 (+8)
417 (+81)
417 (+81)
City MPG
18 (+1)
17 (+1)
16 (+2)
Highway MPG
26 (+1)
24 (+2)
25 (+4)
23 (+3)

"The all-new 2011 Infiniti M's powertrains offer both increased power and efficiency," said Ben Poore, vice president, Infiniti Business Unit. "Our V6 power is up 9% to 330 horsepower, while V8 power is up almost 30% to 420 horsepower and torque is increased 24% to 417 lb-ft -- while amazingly adding 4 mpg Highway for the M56 and 3 mpg Highway for the all-wheel drive M56x."

Multiple advanced technologies allow the new Infiniti M to provide these increases in power and torque while also improving fuel efficiency across all model offerings. The 3.7-iter V6 and all-new 5.6-liter V8 engine both utilize Continuously Variable Valve Timing Control System (CVTCS) to optimize both intake and exhaust valve timing. Variable Valve Event and Lift (VVEL) technology is also applied to the intake valves on both the V6 and V8 engines to improve performance, emissions and fuel efficiency.

In addition, Direct Injection Gasoline? technology is applied to the all-new 5.6-liter V8, providing more precise combustion control to optimize emissions, fuel economy and torque. An electronically controlled 7-speed automatic is applied as the standard transmission on all 2011 M models. As a result of the improved fuel economy figures, the gas guzzler tax previously accessed on the 2010 M45x does not apply to the 2011 M56x.

"It's an impressive feat of engineering to not only gain 95 horsepower and 81 ft-lb of torque while also improving fuel efficiency by up to 4 mpg for the new V8," added Poore. "Most of all, however, we think buyers will be impressed by the smooth, responsive performance of both the new V6 and V8. Power plus efficiency -- that's a great definition of Inspired Performance."

The all-new 2011 Infiniti M is scheduled to go on sale at Infiniti retailers nationwide beginning March 18, 2011.

About Infiniti
Infiniti offers a full-line of luxury performance automobiles that inspire at every turn, including the G Coupe, Sedan and first-ever Convertible, M sedan, EX and FX crossovers, and the QX full-size SUV. More information about Infiniti and its Total Ownership Experience® can be found at www.InfinitiUSA.com.

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    • 1 Second Ago
      • 5 Years Ago
      I think the car looks great. 18/26mpg is great for a fat car with big engine. Would be even better if it drinks regular.
        • 5 Years Ago
        Actually, they could do a lot better :
        Take the Cadillac CTS for example.. DI 3.6, AWD, 18/27mpg hwy.

        20 something less HP, a little more torque at lower RPM.
        17/24mpg for the AWD Infiniti.

        Very similar cars, no?

        DI makes a big difference.
        • 5 Years Ago
        Except GM makes the gearing TALLER for their rear drive-PTO system. 3.42 for 3.6 V6 rear drive vs. 3.23 for 'awd'
        and Nissan, historically, makes their gearing shorter, but not this time. (unless the specs change)

        and Nissan said they would add direct injection to the VQ37 [extra compression ratio perhaps], that could increase mileage.
      • 5 Years Ago
      Could have been a contender... I would not expect Infiniti to be effectively pwned out of the gate by Ford's 5.0 liter Mustang motor in regards to specific output. I used to be a huge Infiniti fan, and owned one even. To me this car is a miss in so many ways.
        • 5 Years Ago
        But there's a difference between a 'value muscle car' and a luxury sedan.
        The real question is, can the large Ford sedans and Lincolns stack up, with the 5.0 v8 motor?

        Last time i checked, those weren't big sellers.
      • 5 Years Ago
      Japanese BMW? NEVER. Go ultimate driving machine
        • 5 Years Ago
        I don't see how Nissan got the weight distributions so bad on this M
        54/46 for rear drive M37
        55/46 for m37x
        56/44 for m56
        57/43 for m56x
        and the gearing on the M56 is tall, top speed is in 5th 185mph, but it still gets up in 6th-180mph, and 7th-175mph.
      • 5 Years Ago
      I can't believe no one stopped at the M56 power figure : 420hp !

      that's the most powerful sedan produced by the Japs short of the IS-F. That's even more than the e39 M5 for god's sake!

      I can't wait to see the performance figures.and how this would stand against the new 550i
        • 5 Years Ago
        550i will be faster, due to 8 speed automatic & better weight distribution
      • 5 Years Ago
      How about decreasing weight and then decreasing power and getting 30/40 MPG? Too much to ask?
        • 5 Years Ago
        Yes. You mean "small cars." A category of which the M is not a member.

        Don't get me wrong - give me a comfortable, reliable car like you described, and I'm sure it'd be great - I'll give it a spin. But it doesn't make sense to ask for that when looking at a picture of a mid-sized luxo-barge.

        Now, maybe an article about the Lexus HS, a MBZ B-class, maybe some sort of Efficient Dynamics-tweaked BMW 1-series.
        • 5 Years Ago
        You guessed wrong. No I just happen to like cars that are lightweight, have great performance with a small engine, and great fuel mileage...yeah you know...those cars that we used to have 15-20 years ago.
        • 5 Years Ago
        let me guess, you drive a prius.
        • 5 Years Ago
        In this segment of cars... that is asking too much.
      • 5 Years Ago
      i think that car would look pimp in black or dark charcoal.
      • 5 Years Ago
      thanks Angelax for setting the record straight. that guy who sweats lexus does not know anything about performance cars, forgive him for his ignorance takes away the better of him.
      • 5 Years Ago
      They used to have a rival to the LS430,S-Class etc which was called Q45.
      • 5 Years Ago
      It's "Mercedes" and "Infiniti." Call me pedantic, but it's hard to take an argument seriously when I see "Mercedez" 15 times in a row.

      Oh, and Ligor - Right-o! It's not like your argument was the least bit subjective, or anything.

      Anyway, my fam's take - we're a Benz family (says the guy with the A4 in the lot), have been since the '70s. It says something to me when Dad, the career Mercedes repair specialist, was jonesin' for the prev-gen M35. They have come a long way. Personally, I gave the G a pass, but that was just a case of preferences.

      In the end, it's hard to buy a car in this segment that really sucks. (glances at the Lexus ES and decides to keep his mouth shut...) It's mostly about preferences at this point.
        • 5 Years Ago
        I hate it when the "Replying to" system doesn't work right. See Page 1 message from hcho3806.
      • 5 Years Ago
      I think it just has big bones! I am not a fan of Infinity but they are better then Lexus.
        • 5 Years Ago

        Better then Lexus? LMAO

        Do they have a car better then the LS600hl? A car that can out run/handle the IS-F? Are they very reliable and as well built as Lexus autos? Does Infiniti has a car that come anywhere near the performance level of the LFA? How many awards how Inifiniti won compared to Lexus? How good are their Hybrids auto? Do they have a car as advanced as the RX Hybrid? DO they have a Hybrid sport sedan like the GSh? Do they have a SUV that can match the Lexus LX570 in luxury and off-road capabilities? Do they even offer performance options like Lexus does with its F-Sport lineup that doesn't void warranty? I can go on and on...

        Lexus > Infiniti
        • 5 Years Ago
        Dude, Infiniti is probably the worst luxury brand..........
        German Big 3>Jaguar>Lexus>Acura>Infiniti
        Don't know where to place Cadillac lol.........
      • 5 Years Ago
      Good looking car. I could deal with 20 mpg in the M56.
      • 5 Years Ago
      hm.... why not add direct injection to the 6 cylinder? it could be getting 29mpg hwy.. with more power :/
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