Infiniti QX50 3.7L AWD: Sporting Instincts

A rare, if mostly unsung gem among many pretenders, the Infinity QX50 is a bona fide sporting crossover SUV that combines a swooping silhouette with a powerful high-revving naturally-aspirated engine and balanced front-mid rear-drive based AWD platform. Smooth and sophisticated, the sportingly sweet and understatedly upmarket QX50’ intuitively incremental character is defined by eager delivery and fluent dynamics.

Photography by Ghaith Madadha, on location in Jordan

Longer, aesthetically revamped and better equipped than ever for 2016, the Infiniti QX50 was first launched in 2007 as the EX model line and re-branded as the QX50 by 2013 as part of the sporty premium Japanese brand’s revised nomenclature and model line-up. An early inductee into the increasingly popular compact premium crossover (CUV) segment, the updated QX50 retaining a longer version of the same platform and driveline as the outgoing model but also remains among the most rewarding and engaging drives in its class, even among more recently developed competitors.

A rare and authentically sporting vehicle in the crossover segment, the QX50’s sports-saloon derived credentials in this regard include its powerful high-revving naturally-aspirated engine, balanced front-mid engine position and rear-drive based four-wheel-drive and sophisticated double wishbone front and multi-link rear suspension. Coupe inspired in design with long swooping bonnet, short front overhang, rearwards cabin position, descending roofline, wavy design lines and urgent, pouncing and alert silhouette, the QX50 well-complements the brand’s shark-like QX70 – formerly the trend-setting FX – sports SUV and has been revised to better integrate with Infiniti’s sharper and more assertive contemporary familial styling.

If not as dramatically moody and menacing as its larger QX70 stable-mate, the revised QX50 is however now more assertive and notably features Infiniti’s new double-arch grille frame with weaving design, and a restyled front bumper with bigger, deeper and hungrier intake. Sitting slightly higher off the ground, it also receives new sills, rear bumper and fascia, side mirrors with integrated indicator lights and 19-inch alloy wheels with 245/45R19 tyres. Distinctively sporty with rear window kink and L-shaped headlights with LED running lights, the QX50 also features a tailgate spoiler and dual chrome tailpipes

Photos courtesy of Infiniti

Velvety smooth, long-legged, eager and willing, the QX50’s fondly familiar and well-regarded VQ-series 3.7-litre naturally-aspirated V6 is the sort of engine that is becoming ever-rarer in a landscape becoming dominated by smaller displacement turbocharged units. Sweeping through towards its 7500rpm rev limit with progressive fluency, it unleashes its impressive output in precise increments and with pin-point throttle control accuracy, to allow one to dial in exact amount of torque and power to not overpower tyre grip or unnecessarily set off electronic stability control intervention. Its accuracy and progressive character lend themselves to more fluent and intuitive driving and handling.

Responsive and willing from tick-over, the QX50 pulls confident and hard from low-end with good versatility throughout. Building urgently, it develops its maximum 266lb/ft torque by 5200rpm and its full 326BHP by a haughty 7000rpm. Peaky and precise, the QX50’s sublime engine sends power through a smooth, slick and swift shifting 7-speed automatic gearbox with manual mode shifting available and downshift rev matching automatically blipping the throttle for more fluent driving. Refined and quiet at low rev  an load, the QX50’s engine note develops from thrusting, whirring and whining and hardens to a more intense and urgent wailing as revs rise.

Capable of 0-100km/h in 6.4-seconds or less, and of a 240km/h maximum, the QX50’s fuel consumption is moderate when driven so, but rises somewhat when one succumbs to the temptations of its high rev thrills. Power is normally sent to the rear wheels, with up to 50% redirected to the front wheels as and when added traction and grip are necessary. Through narrow winding hill climbs, the QX50’s traction control can be disabled for more driving fluency, and at which point one can feel the four-wheel-drive system actively clawing back traction when over-steering, to make brisk, fluid and intuitive progress.

With rear-wheel-drive instincts and four-wheel-drive security mated to a balanced and sophisticated chassis and natural and quick hydraulic-assisted steering with better feel than most electric systems, the QX50 drives as close to a sports car as a high-riding and somewhat heavy 1873kg crossovers can. Agile, tidy and eager into corners, the QX50’s firm front grip give way to slight under-steer at the limit. One can however correct this by pivoting weight rearwards for slight over-steer, which is corrected by its four-wheel-drive as it digs into the tarmac and launches out onto a straight.

Adept and agile through switchbacks, the QX50’s weight is evident, but body lean is for the most part very well suppressed. Riding firm and smooth but uncomfortable, the QX50 fluently processes most road texture imperfections. Pitching slightly on crests, the QX50 is however buttoned down and confidently settled on rebound, while at speed is reassuringly committed, stable and refined. Thoroughly impressive during test drive on Jordanian roads, one considered whether firmer damping would further enhance the QX50’s vertical control, body lean and keep tyres yet more firmly pressed down. Meanwhile, perhaps more forgiving tyres and smaller alloys would further improve ride suppleness.

Classy and with a welcoming ambiance inside – especially with darker tones – the QX50’ cabin has quality feel to it in terms of construction, materials and textures. Highly adjustable seating is comfortable and supportive for long hours on end, while driving visibility is good for the most part, but is assisted by bird’s eye and reversing view monitors. Rear leg and headroom was however surprisingly generous even for larger passengers, while boot space is also accommodating. Well-equipped, the QX50 features numerous safety, convenience, infotainment and driver assistance systems.

Specifications: Infiniti QX50 AWD

  • Engine: 3.7-litre, in-line V6-cylinders
  • Bore x stroke: 95.5 x 86mm
  • Compression ratio: 11.1:1
  • Valve-train: 24-valve, DOHC, variable timing
  • Gearbox: 7-speed automatic, four-wheel-drive
  • Ratios: 1st 4.923 2nd 3.193 3rd 2.042 4th 1.411 5th 1.0 6th 0.862 7th 0.771
  • Reverse / final drive ratio: 3.972 / 3.133
  • 0-100km/h: 6.4-seconds
  • Maximum speed: 240km/h
  • Rev limit: 7500rpm
  • Power, BHP (PS) [kW]: 326 (330) [243] @7,000rpm
  • Specific power: 88.2BHP/litre        
  • Power-to-weight: 177.4BHP/tonne
  • Torque, lb/ft (Nm): 266 (361) @5,200rpm
  • Specific torque: 97.67Nm/litre
  • Torque-to-weight: 192.73Nm/tonne
  • Fuel consumption, combined: 10.6-litres/100km
  • Fuel tank: 80-litres
  • Length: 4,745mm
  • Width (with mirrors): 1,853mm
  • Height: 1,590mm
  • Wheelbase: 2,880mm
  • Track, F/R: 1,535 / 1,550mm
  • Ground clearance: 165mm
  • Approach / break-over/ departure angles: 17.9° / 16° / 20.8°
  • Aerodynamic drag co-efficiency: 0.33
  • Headroom, F/R: 983 / 957mm
  • Shoulder room, F/R: 1,392 / 1,397mm
  • Loading height: 741mm
  • Minimum boot capacity: 526-litres
  • Kerb weight: 1873kg
  • Weight distribution, F/R: 54/46%
  • Steering: Variable-assisted, rack and pinion
  • Lock-to-lock: 2.85-turns
  • Turning circle: 11.9-meters
  • Suspension: Double wishbone / multi-link, anti-roll bars
  • Brakes, F/R: Ventilated discs, 330mm / 308mm
  • Tyres: 245/45R19
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