InsideLine Video: 2011 Infiniti M56 vs. 2011 BMW 550i Comparison Test

5-series | December 28th, 2010 by 20
2011 infiniti m56 f34 fe 1115101 1600 750x500

InsideLine puts out a comprehensive comparison between BMW’s latest generation 5 Series and its counterpart in the Infiniti line-up, the M56. The top of the …

InsideLine puts out a comprehensive comparison between BMW’s latest generation 5 Series and its counterpart in the Infiniti line-up, the M56.

The top of the line 550i receives a mixed review from InsideLine with some of the negative points we have heard lately, or even experienced ourselves behind the wheel of the new 5: steering feels artificial and a bit overweight (4,400 lbs).

But it’s the 550i an overall better car?

Let’s see an excerpt from their review:

How They Stack Up
Not surprisingly, the 2011 BMW 550i and 2011 Infiniti M56 have plenty of similarities. Both are rear-drive sedans powered by sizable V8s. In this case, both are hooked to automatic transmissions, a seven-speed in the Infiniti and an eight-speed in the BMW.

2011 bmw 5 series group fe 1115103 1600 655x436…..

What’s the Motivation Here?
Turbocharged engines are quickly becoming the norm at BMW, and now the 550i is on board. Its direct-injected 4.4-liter twin-turbo V8 produces 400 horsepower at 5,500 rpm and 450 pound-feet of torque from 1,750-4,500 rpm. Yes, that’s a massive torque curve, but it comes at the expense of the old V8’s rumbling exhaust. Now there’s little more than a muted growl, and you can’t even hear the turbos working their magic.

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The 2011 Infiniti M56 uses cubic inches and plenty of revs to achieve its power. Its 5.6-liter V8 is good for 420 hp at 6,000 rpm and 417 lb-ft of torque at 4,400. It’s no dinosaur, also utilizing direct-injection and variable valve timing and valve lift for a smooth, reasonably efficient power plant.

A little more driver involvement is required to get the most out of the M56’s V8, though, as its power is concentrated at higher engine speeds. The Infiniti sounds more like a sport sedan than the BMW, especially when it approaches the 6,700-rpm redline.


By the Numbers
At our test track, the M56 was slightly quicker to 60 mph than the 550i, 5.0 to 5.2 seconds, respectively (4.7 and 4.9 seconds with a 1-foot rollout, as on a drag strip). So the BMW is slower, despite the fact that it’s capable of getting a near-perfect amount of wheelspin off the line thanks to power-braking, something the Infiniti’s brake-override system won’t allow.

So how come the BMW is slower? Might have something to do with the extra 287 pounds of ballast the 4,380-pound 550i carries versus the M56. Seriously, what’s a 5 Series doing weighing nearly 4,400 pounds? This is “EfficientDynamics?”

Weight aside, by the time the 550i hits the quarter-mile, its twin-turbo V8 inches the BMW ahead by 0.1 second (13.2 vs. 13.3); it’s also traveling a lot faster at this point — 108.3 mph against the Infiniti’s 106.7.

Full review at Insideline.

20 responses to “InsideLine Video: 2011 Infiniti M56 vs. 2011 BMW 550i Comparison Test”

  1. StraightSix says:

    BMW looks better but Infinity uses atmospheric engine so….. N/A engine for the win.

  2. Don’t even try to compare shitty nissan to the GREAT PREMIUM car which is BMW!

    • Clinton says:

      I’m not a fan of Japanese cars either, but still give respect where due because they too have produced some phenomenal groundbreaking vehicles. Point is BMW won this one by default; this wasn’t even a win if you ask me. Let’s just hope the M5 brings it back.


    • Daniel Hoang says:

      Its not about the brand but the car itself. Its quite obvious that this generation isnt really as sporty as say the e39. Many car companies look up to bmw as they were the benchmark for luxury sporty vehicles. It seems bmw isnt faring well recently. The Nissan division has created many great cars such as the skylines, silvas and many more. You cant just say bmw is better because its a bmw. Thats bias.

  3. viper says:

    I think they both look good , I prefer infinity looks…I also prefer bmw engine in this one….so take the best out of too and you have a really great package.

  4. giorgios says:

    BMW once again ….INSUPERABLE….

  5. kcsnyud says:

    its not fun to drive. that is what counts

  6. Danny Shore says:

    Is there something wrong with the facebook login? I’m logged in as Alex Rossbach

  7. Joe says:

    Sorry to see BMW slipping a little.. think they focused a lot on luxury this time around.

  8. The M56 looks edgier, more modern and aggressive due to the front headlights. However the bmw looks classier. They both are darn good looking cars. From pics and from what I’ve read I would pick the BMW even though the Infiniti has 20 more hp. I prefer the Bimmers style, looks and legacy! However, I would need a test drive in order to get a good feel for both cars. Sometimes you can’t really tell which car you prefer until you take it out on a nice spin.

  9. Babken says:

    Inside Line seems too biased against BMW 5 Series so I’m not surprised to hear bullshit like the M56 is a better performer than the 550i. I can bet if we put them on the race track the 550i will turn the M56 to ashes. Besides, the 550i can achieve 100 kmh in 5 seconds flat. Anyway however biased they seem they couldn’t just give the crown to the M56 because the automotive world would laugh at their stupidity.

    • Brandon says:

      This is by far the most ignorant and idiotic comment on this entire blogs post. Did you watch the video? They DID in fact put them on the track… The Infiniti won hands down. Pay attention and use logic instead of skewed personal emotional attachment before making comments next time. I’m sure you are driving a 328i on really cool 7″ wide Konig rims bro.

  10. JakeM says:

    So according to this review the M56 is clearly the better sports sedan but the BMW wins because it is easier to live with on a daily basis?

    Is this right? That’s what this review tells me.

    If the criteria of this comparison was sport, then it seems the Infiniti should have won. If you’re looking for the more “daily driver” oriented car, the BMW should be more appealing given how it is apparently more comfortable.

    Ok, so most reviews have bemoaned the F10s “soft-like” character in terms of handling. I really need to drive one to see what all the fuzz is about…

  11. X5SoB says:

    InsideLine’s review was pretty harsh. While I have to agree that the M56 is one hell of a nice car, the BMW is still a pretty refined piece. Yes, I too have railed against the electric steering assist, but the overall package is still sound. BMW needs to refine the new changes, and I have no doubt they will.

  12. TOX says:

    BMW much better !

  13. jaffa426 says:

    If you equipped the Bimmer with the optional M sport package it would out brake and corner the rice burner at the drop of a hat. I see the Infinity was equipped with the sport package why not keep things even? I didn’t think so.. Lets not overlook the ugly factor in the rear styling of the Infinity. The 550 is a rocket and as powerful and fast as the old world champ M5 just a few years ago.

    • Brandon says:

      Try to keep things even from a price perspective… the M is an additional $35000. So yeah, let’s do a side by side with a car that cost $65,000 vs. a car costing $100,000. Logical!

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