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With new active safety and communication technologies
2014 Infinity Q50 sedan replaces the G47 this summer:
3.7 V6, hybrid 3.5 V6, 7-speed auto and RWD or AWD

2014 Infinity Q50 sedan: front-side 3/4 picture.

The 5-passenger Infiniti Q50 in the premium midsize segment.

17 Jan. 2013, Tony Kanaan: From this summer, the new premium midsize Infiniti model will be called the Q50, when it replaces the current G37.

The reason of this change is not limitied to the 2014 Infiniti Q50, which gets its world première at the 2013 North American International Auto Show in Detroit (NAIAS, public days from 19 to 27 January).

 The Q

Infiniti Q50 is in fact the first model to bring the new naming structure to Infiniti, the premium brand of the Japanese Nissan carmaker, to simplify the designations in its model range.

Simply put, the Q prefix will be adopted for sedans (4-door saloons), coupés and convertibles (cabriolets), while the addition of the X after the Q will mean that the QX will be for crossover and SUV models.

2014 Infinity Q50 saloon: profile view.

Infiniti's dynamic arch roofline and "crescent-cut" C-pillar.

Following the prefix, the double digits will represent the segment position of the model within the range, rather than the engine displacement or power. Many manufacturers are taking this path, especially that the constant evolution of modern engine technology is leading to more power and torque from smaller displacements, less cylinders, direct injection, better alloys, more precise electronic controls and other means such as turbochargers or direct compressors, at least in a growing number of models.

With this in mind, potential customers may associate a smaller number in a model's name, with a reduction in its power, while the opposite is often true and only the displacement is smaller (with better fuel economy). BMW's naming policy is another example: a BMW 328i has a turbocharged 2.0-litre, 4-cylinder engine and a BMW 335i has a turbocharged 3.0-litre, 6-cylinder engine.

2014 Infinity Q50 5-passenger sedan: rear-side 3/4 picture.

The rear double-arch boot line completes the arch theme.

Back to the "Q", and for the record, Infiniti’s first flagship model was launched in 1989, and it was a "Q": the Q45. At the time, the "45" figure represented the 4.5-litre capacity of the V8 engine.

Hence, the 5-passenger Q50 model will represent the brand in the premium midsize segment which includes the likes if the BMW 3-Series, Audi A4, Mercedes-Benz C-Class, or the Lexus IS model which will also get its new generation this summer. 

The main specifications of the new Q50 (American specifications. Other specs will be announced later for each market in Europe, South Africa, Middle East and Russia) begin with the choice between the rear-wheel drive or all-wheel drive systems, a 3.7-litre V6 (328-horsepower) gasoline (petrol) engine, or the 3.5-litre gasoline V6 petrol engine with the Direct Response Hybrid System.


Outside, the midsize premium model comes with a dynamic design in comfortable body dimensions for the wheelbase (2850 mm, 112.2 inches), overall length (4782 mm, 188.27 in.) – both equivalent to those of the G37 – with 1824mm (71.8 in.) for the width and 1443mm (56.8 in.) in height. The coefficient of drag stands at a good 0.26 figure.

Infinity Q50: front view.

Infiniti's “double arch” grille.

The exterior design features what Infiniti calls the “double arch” grille, with a dynamic arch roofline and "crescent-cut" C-pillar. On the side, the heated outside mirrors come with standard integrated LED turn signals.

At the rear, the side lines merge with the shape of the rear LED combination lights. The rear double-arch boot line completes the arch theme. A power sliding and tilting glass sunroof is optional.


The interior comes with a driver-oriented cockpit, a choice of different fabrics and colours, including leather-appointed seating surfaces, and the new Infiniti InTouch communications system with large dual touch-screens. Of course, features need to be checked if standard or optional, depending on markets and versions.

Interior features include Dual-Zone Automatic Temperature Control, Bluetooth Hands-free Phone System, RearView Monitor and optional Advanced Climate Control System (ACCS) with Plasmacluster air purifier and Around View Monitor with Moving Object Detection.

The luggage volume is announced at 510 litres (18 cubic-foot) with the 3.7-litre V6 and 399 litres (14.09 cu. ft.) with the hybrid powertrain.

The cabin also gets a standard Active Noise Control, which helps in cancelling of intrusive low frequency noise, from four door-mounted speakers.


The 2014 Infiniti Q50 will be launched in North America with two petrol engines, followed by other options in other global markets later in the year.

The 3.7-litre aluminium-alloy V6 engine features DOHC 24-valve with Continuously Variable Valve Timing Control System (CVTCS) and Variable Valve Event & Lift (VVEL). It develops 328 horsepower (245 kW) and 269 lb-ft (364.6 Nm) of torque.

The optional hybrid powertrain features Infiniti's Direct Response Hybrid system with Intelligent Dual Clutch Control. It combines a 3.5-litre 24-valve DOHC aluminium-alloy V6 petrol engine and compact laminated lithium-ion battery design with a one-motor/two-clutch motor control.

The hybrid's V6 is rated at 302 horsepower (225 kW) and 258 lb-ft (350 Nm) of torque, while the 50 kW electric motor is rated at 67 horsepower and 199 lb-ft of torque (270 Nm). The hybrid system net power is 360 horsepower. The Hybrid system net power comes at 360 horsepower (268 kW).

Both powertrains are matched to a 7-speed electronically controlled automatic transmission with manual shift mode (with both the rear-wheel drive or the all-wheel drive systems) and optional steering column-mounted magnesium paddle shifters.

 Direct Adaptive Steering

On the active safety side, Infiniti lists other options which include an intelligent cruise control with full speed range, predictive forward collision warning, forward emergency braking, distance control assist, blind spot intervention, back-up collision intervention, high beam assist, the lane departure prevention as well as two new technologies make their debuts in the Q50: the  Infiniti Direct Adaptive Steering technology and Active Lane Control.

While the Q50 comes with a standard vehicle-speed-sensitive power steering, an optional Direct Adaptive Steering system allows advanced control of the tire angle and steering inputs, transmitting the steering wheel movements to the wheels faster than the mechanical system. The aim is obviously to increase the direct driving feel thanks to the faster feedback received by the driver.

2014 Infinity Q50 sedan: interior, dashboard, seats, console and doors trim.

The interior comes with a driver-oriented cockpit.

Four different steering settings allow the customization according to driver preference or road conditions, as the driver can change both steering effort and the steering gear ratio. Models fitted with the new Direct Adaptive Steering technology still have the mechanical steering system as a backup.

 Active Lane Control

The also optional Active Lane Control system uses a camera-based lane marker detection system to further enhance on-center driving capability.

Infinity explains that while it is included as part of the Lane Departure Prevention system, the Active Lane Control system goes further, since it does not only read the road ahead (the camera is located above the rear view mirror) for unintended lane drift, but it also makes small steering input angle adjustments if the Q50 undergoes minor direction changes due to road surface changes or crosswinds (as detected by the lane marker detection system). Infiniti adds that with less steering adjustments to do, the driver could experience less tiredness over longer distances.


The Japanese luxury carmaker underlines the suspension's extensive use of lightweight aluminium components, along with front and rear stabiliser bars, in addition to the improvement in front body stiffness (versus the previous generation).

The four-wheel independent multi-link suspension of the Q50 features at the front a single pivot double-wishbone design, while the revised rear design utilises a multi-link design with coil springs and Dual Flow Path shock absorbers, with increased camber stiffness. A sport-tuned suspension is available with Sport models.


Below the suspension, the Q50 rides on 17-inch machine-finished aluminium-alloy wheels with 225/55R17 all-season run-flat tyres. Optional 19-inch aluminium-alloy sport wheels are available with 245/40R19 run-flat all-season or summer tyres.


The standard braking system includes 4-wheel power-assisted vented disc brakes with 4-wheel Anti-lock Braking System (ABS), Electronic Brake force Distribution (EBD) and Brake Assist (BA). Optional sport brakes come with upgraded discs, 4-piston front calipers and 2-piston rear ones.


2014 Infinity Q50: Infiniti InTouch with two touch capacitive screens.

Infiniti InTouch: two touch capacitive screens work together.

With the new Infiniti InTouch telematics system, the Q50 gets two touch capacitive screens. Both screens work together, allowing the navigation map to be viewed on the top screen while setting destinations or finding points-of-interest on the lower one. Certain functions, such as heating and cooling, are operated by hard switches.

Infiniti indicates that a selection of vehicle-related apps will be pre-loaded into the system, with the possibilty to download, update and sync personal apps through the owner's smart-phones and USB drives.


Another option is the new i-Keys system which can recognise up to four different drivers and automatically engage the pre-set preferences for driving position, heating and cooling, audio, navigation and telematics. Default and customisable settings are accessed through the dual touch-screen displays.

Also, the drive mode selector located on the centre console permits the selection of different sport or touring settings for the engine, transmission, handling and steering adjustments.


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