First Drive: 2011 Infiniti MThird Time's A Charm: With the debut of Gen III, the Infiniti M Appears Ready for Prime TimeBy Ron Kiino, Motor Trend

The last time we had an Infiniti M in a comparison test -- a 303-horsepower, seven-speed M35 S -- it finished eighth... out of eight cars. Or, as the seven other luxury brands are happy to point out, dead last. For the 2011 model year, though, Infiniti has put to bed the last-place second-gen M and pulled out from under the covers a third gen that is more stylish, more powerful, more fuel-efficient, and more technologically advanced. As you can tell, it's got more of just about everything, a fact that will no doubt make it a formidable participant in the next shootout. But until we can amass another luxe-sedan showdown, let's examine whether the 2011 M truly has the goods to be great.
Up 0.6 inch in length and 1.5 inches in width but down 0.3 inch in height, Infiniti's fresh flagship wears sleeker, more curvaceous sheet metal draped over available 20-inch wheels (18s are standard), all of which make it look like an enlarged G sedan. Many of the styling cues, e.g. the sculpted fenders and low-slung, upright grille, come from the voluptuous Essence concept that debuted at the 2009 Geneva auto show. Inside, the refinements continue with abundant premium leather and wood, providing a richer ambiance than its predecessor. For the aesthetically and tactilely picky, a new deluxe touring package adds super soft semi-aniline leather, suedelike headliner, and unique Ash trim that has been hand-buffed with genuine silver powder (to see wood softly sparkle under sunlight is reason enough to drop the $3800). And unlike the 2010 model, the 2011 presents a more user-friendly center stack that not only utilizes fewer buttons but also is angled more towards the driver. All occupants will appreciate the M's available Forest Air HVAC system, which provides humidity control, a breeze mode that alternates airflow for a more natural feeling, and auto recirculation that detects dust and foul odors, as well as a class-leading 103.6-cubic-foot interior.

Under hood, the M ditches the previous 3.5-liter 303-horse V-6 and 4.5-liter 325-horse V-8 in favor of a 3.7-liter 330-horsepower V-6 (M37), a direct-injected 5.6-liter 420-horse V-8 (M56), and, come spring 2011, a 3.5-liter V-6 paired with a lithium-ion battery pack (M35 Hybrid). Both the M37 and M56 come standard with a seven-speed automatic and are available with all-wheel drive as well as a sport package that includes double-piston dampers, four-wheel active steering, four-piston front brake calipers, shift paddles, sport seats/steering wheel/shift knob, and 20-inch alloys with summer tires.
Recently we had a chance to sample the 2011 M lineup for a day, and found both the M37 and M56 to be especially lively and quick. The M37's 3.7-liter V-6 seemed an ideal match for Infiniti's flagship, and should have no problem bettering the old M35's 5.8-second 0-60 time, especially given a weight loss of six pounds. Further, fuel economy with the six increases from 17/25 to 18/26. As with most sedans in this segment, the V-6 sounds so sporty and comes across so robust that a V-8 is really unnecessary. Nevertheless, eights are expected in the M's class, and the 5.6 will likely fulfill the 15 percent take-rate that Infiniti predicts. Given that the 2010 M45's 4.5-liter generated "only" 325 horsepower, the 2011's 95-horse bump represents a huge leap in performance, especially since, according to Infiniti scales, the M56 has gained just 70 pounds. We expect 0-60 times to fall below five seconds, but one thing not falling is gas mileage -- it's up from 16/21 to 16/25.
Enthusiasts will appreciate the 2011 S trims' steering wheel-mounted magnesium shift paddles, a feature absent in the 2010 model. Part of the aforementioned sport package, the paddles allow for manual gear changes of the seven-speed, which also features downshift rev matching. The larger Akebono brakes, another upgrade of the sport pack, offer up progressive pedal feel and stout performance, and the M's steering proved quick, linear, and communicative. A new four-mode (standard, eco, sport, snow) Infiniti Drive system comes standard, and Infiniti's Safety Shield adds the world's first blind-spot intervention system (selective braking intervenes to pull the car back into its lane) to lane-departure warning, lane-departure prevention, intelligent cruise control, and distance control assist safety systems.
Whether all of these improvements are enough to set the new M apart from the 2011 BMW 5 Series, not to mention the Mercedes-Benz E-Class, Jaguar XF, et al, remains to be seen. We'll reserve that judgment until we have the opportunity to drive them back-to-back. Regardless, with the arrival of the M, this segment has become more competitive than ever.
2011 Infiniti M37 and M56 Test DriveThe 2011 Infiniti M37 and M56 try to take on BMW and Mercedez-Benz in midsize luxury. Here is how the vehicles fare on a demanding mountain test drive.By Ben Stewart, Popular Mechanics

Two months ago we had a chance to spend some time behind the wheel of prototype versions of Infiniti's new M37 and M56 sedans. We were certainly impressed. But it's difficult to judge a luxury car when there are still some rough edges to smooth out.
Well, after driving the production sedans for a day on some challenging driving loops in the mountains near San Diego, we can say these new Infinitis are assuredly smooth. The midsize luxury sedan class has been heating up thanks to recent launches of the new Mercedes-Benz E-Class and BMW 5 Series. Are these Infinitis capable and comfortable enough to take on these legendary German rivals? Let's find out.
The SpecsUnder the hood of the $46,250 M37 is the familiar 3.7-liter VQ-series V6, now rated at 330 hp and 270 lb-ft of torque. But the biggest news, for those who relish the thrust from V8 power, is the motor in the $57,550 M56. The new 5.6-liter V8 is rated at 420 hp and 417 lb-ft of torque. Both engines are paired to a seven-speed automatic and all-wheel drive is optional.
M37s are rated to deliver 18 mpg city and 26 highway, while the V8 M56 model's performance dips slightly to 16 mpg city and 25 highway.

Like nearly every other car in Infiniti's lineup-with the exception of the hulking QX56 SUV-the new M sedans ride on an updated version of the company's FM platform. This architecture is so flexible it can underpin cars as varied in size and mission as the Nissan 370Z and the Infiniti FX crossovers.
Unlike most new car redesigns today, the dimensions of the M have not grown by much in this latest generation-it is wider by 1.5 inches, lower by a fraction of an inch and slightly longer too. But the wheelbase remains the same, and that means the interior provides roughly the same roominess as the old car. The new Ms haven't gained much weight either, the M37 at 3858 pounds is 6 pounds less than the old car and the M56 is 70 pounds more than the old M45.
The focus of the new M's chassis was refinement. Upfront, the double-wishbone suspension remains largely the same. But in the rear, the multilink design has been heavily modified with far beefier-looking lower links, retuned rubber bushings and a new coilover shock design. The goal? Increase comfort without loosing any of the sportiness.
Speaking of the "s" word, a sport package can be optioned on either the V6 or V8 cars. This includes larger 14-inch front rotors (13.8-inch in the rear) along with new dual-piston shocks, four-wheel steering (up to 1-degree rear steer in phase with front wheels) and 20-inch wheels with summer tires-amongst numerous interior upgrades such as magnesium paddle shifters and thicker bolstered seats.
The new M is packed with technical prowess too. There's a standard Drive Mode Selector that will vary throttle progression and transmission shift mapping for one of four modes, standard, sport, eco and snow.
The option list is deep with new tech too. There's not only a blind-spot warning system but also Blind Spot Intervention that uses cameras and individual wheel braking to guide the car away from a lane that is occupied. Similarly, Active Trace Control will use selective individual wheel braking to set the car up for an upcoming corner-it's almost like a pre-stability control. The system doesn't make the new M corner any more quickly, but it does smooth out transitions.
The new M will have a hybrid model for 2012. Until then the Eco Pedal option is there to satisfy fuel-frugal drivers by providing feedback at the pedal when you are accelerating too forcefully in Eco Mode.
Inside, the Forrest Air system combats what is one of the more annoying shortcomings of any climate system-constant air blowing straight at your face. Instead of fiddling with the vent controls and reluctantly sending all the airflow to your feet, this system manages air for you and sends a pleasant breeze-like flow of air around the cabin.
But one of our favorite tech advancements could be the simplest one. Intelligent Key allows individual fobs to store seating, mirror and steering wheel position, audio, nav and climate settings. So walk to your M sedan with "your" fob in your pocket and the car will automatically adjust to the settings you like best.
The DriveSlide behind the wheel of the new M and you'll immediately notice that the level of craftsmanship and polish has improved over the old car's. The plastics and fitment of the various interior components are far richer and more luxurious than before.
Okay, so how do they drive? Though the new Ms don't really weigh any more than the outgoing models, there is a sense of solidity and heft to these sedans that wasn't there before-sort of like a BMW 7 Series.
The handling is still very sporty, the steering precise, and the M37 and M56 probably deliver higher limits than the old M sedans-especially with the sport package. Still, there's an edginess that has been smoothed out of this car. The old M was more raw and unpolished-and that actually made it quite fun. This new one is more restrained and more effortless to drive quickly. And that makes it slightly less involving. In other words, the new M now finally feels like a luxury sedan.
For most, the M37 provides just the right amount of thrust. And it is engaging, with a sweet V6 howl that only seems to get better with each generation of Infiniti car. But the M56 is the one we want. Its effortless power and torque reminds us why we love V8s. And its enormous thrust makes it far quicker than any previous Infiniti M sedan. The only problem is that the sound of the V8 is muffled. We'd like to have seen louder mufflers bundled with the Sport package on the V8 cars.
The Bottom LineInfiniti has added considerable refinement to its flagship sedan. The M may have had some of its edginess polished away. But these sedans are easily the most comfortable and luxurious cars Infiniti has ever produced. In fact that finely tuned blend of sportiness and luxury in these new M sedans could steal quite a bit of business from Infiniti's German rivals.