"The new G35 Sedan, which has been named to both Car and Driver’s "10 Best Cars" and Automobile magazine’s "All-Stars" list, has set the stage for the introduction of the new G37 Coupe," said Mark Igo, vice president and general manager, Infiniti Division. "The new Coupe builds on the styling, performance and interior enhancements of the G Sedan, adding the dynamic style, sporty atmosphere and expressive driving character expected of a class-leading luxury sport coupe. The line starts here."
Exhilarating Performance From a New Engine Design
Leading the enhancements to the 2009 Infiniti G37 Coupe is the first-ever application of the new 3.7-liter V6 engine with VVEL (for Variable Valve Event and Lift).
Estimated at 330 horsepower and 270 lb-ft of torque, the new "VQ37VHR" contains approximately 35 percent new and unique parts from the new VQ35HR engine introduced in the 2007 G35 Sedan just last year. Both the Coupe’s VQ37VHR and the Sedan’s VQ35HR engines are based on the award-winning VQ engine series, named one of the "Ten Best Engines" by Ward’s Auto World magazine for 13 consecutive years.
Along with utilizing a larger displacement than the previous 3.5-liter powerplant, the G37 Coupe’s new VVEL system combines hydraulic-controlled variable valve timing and electronically controlled variable valve lift on the intake side to help improve performance and response. The VVEL system is also expected to improve emissions and fuel efficiency. The VVEL intake camshafts, featuring continuously variable lift control teamed with the Continuously Variable Valve Timing Control System (CVTCS), allow for a 7,500 rpm redline.
The engine also features increased cylinder block height (from the previous 3.5-liter design), ladder frame construction for greater rigidity, large crank journal and pin diameters, asymmetric piston skirts, twin knock sensors, an electronically controlled "drive-by-wire" throttle system, molybdenum coated lightweight pistons, Iridium spark plugs and a symmetric twin air intake system.
A new, specially tuned dual exhaust system has been designed with equal length exhaust manifolds and low muffler exhaust backpressure to help improve engine breathing. Both intake and exhaust enhance driving pleasure with their authentic performance notes.
Rated at an estimated 330 horsepower, the new engine is not only considerably more powerful than the previous generation G Coupe (rated at 275 hp with 5AT, 293 hp with 6MT), but is expected to offer increased fuel mileage and reduced emissions levels. Overall vehicle fuel economy improvements are estimated to be nearly one mpg better than the G35 Sedan and nearly two mpg better than the previous generation G35 Coupe (actual EPA mileage estimates and emission information to be announced at a later date).
"The new 3.7-liter V6 is a true powerhouse – becoming more enjoyable as you drive it" said Igo. "And, this powerplant also features Infiniti’s trademark "Swell" acceleration – introduced on the new G Sedan last year – with special tuning that builds horsepower almost continually to the redline like a building wave."
The G37 Coupe engine is backed by a choice of an upgraded electronically controlled 5-speed automatic transmission with manual mode, downshift rev matching, DS mode and ASC (Adaptive Shift Control) that allows for quicker shifts in sporty driving situations and available genuine magnesium paddle shifters; or a newly revised, lightweight 6-speed manual transmission.
Performance Platform and Suspension
Developed at test circuits throughout Europe – including the famed Nürburgring – the G37 Coupe was conceived as a performance thoroughbred. Handling and ride performance increases come from the G37 Coupe’s enhanced FM (Front Mid-ship) platform, which has been stiffened 36% from the previous generation, is lower in overall height and has a wider front and rear track width.
The G37 Coupe’s 4-wheel independent suspension design features lightweight aluminum components and large front and rear stabilizer bars, increased spring rates and optimized suspension damping.
The front suspension is a double-wishbone design, with a single pivot lower wishbone and a long upper link.
The multi-link rear suspension separates the shock absorbers and springs, locating the shock absorber inline with the wheel center. These designs help minimize alignment changes and reduce suspension friction for nimble handling and smooth riding characteristics.
Steering is provided by a twin-orifice vehicle-speed-sensing design, which provides optimum steering effort at both high and low vehicle speeds. Standard on all G37 Coupes is Vehicle Dynamic Control (VDC), which assists in enhancing vehicle stability under a variety of driving conditions.
Also available on the new G37 Coupe is Infiniti’s exclusive 4-Wheel Active Steer system (4WAS). With unique chassis configuration that features automatically variable front steering ratios and rear suspension geometry that adjusts to steering input and vehicle speed via motor-driven controls. The system’s electronic control unit calculates the desired vehicle dynamics from a series of sensors, including vehicle speed and steering angle, and separately directs both the front and rear actuators to change steering gear ratios and rear geometry by moving both the front steering gear and rear suspension lower links – thus providing sports car-like agility and secure stability.
Braking performance is provided by standard 4-wheel vented discs with 4-channel, 4-sensor Anti-lock Braking System (ABS), Electronic Brake force Distribution (EBD) and Brake Assist (BA). The standard G37 Coupe adopts the "sport" braking system of the recently introduced G35 Sedan. The G37 Coupe Journey with Sport Package and G37 Coupe Sport 6MT are further enhanced with aluminum four-piston calipers (front)/two-piston calipers (rear) embossed with Infiniti lettering and large ventilated rotors – 14.0-inch front and 13.8-inch rear.
Also available on G37 Coupe is Infiniti’s Intelligent Cruise Control (ICC) with Preview Braking, which provides a precise following distance from the vehicle ahead. It also identifies sudden braking situations with laser sensors to determine distance and relative speed of the vehicle ahead in the same lane and "pre-pressurizes" the Brake Assist system before the driver steps on the brake pedal.
A new 18-inch wheel and tire package is standard on G37 Coupe, featuring a "split 5-spoke" 18x8-inch aluminum-alloy wheel design with P225/50VR18 all-season tires. A new 10-spoke 19-inch wheel and tire package, with lightweight cast aluminum wheels and high performance tires, is also available. A Tire Pressure Monitor System (TPMS) is standard on all 2009 G37 Coupes.
To enhance the already high level of dynamic performance, the G37 Coupe 6MT and G37 Coupe Journey with Sport Package come standard with unique sport suspension, a Viscous Limited Slip Differential (VLSD) and a new wheel and tire package with 19x8.5-inch front wheels with 225/45WR19 front tires and 19x9-inch rear wheels with 245/40WR19 rear tires.
The G37 Coupe’s advanced performance systems are wrapped in an all-new seductive skin, giving the vehicle a kinetic feeling with emotional surface expression, sweeping character lines and tight panel gap lines. "Compared with its predecessor, the G37 Coupe is longer, lower and wider – indicative of the power and technology of the vehicle," said Igo.
Exterior highlights include flowing front fender curves, a wave-style hood, expressive front fascia with Infiniti’s signature double-arch grille and L-shaped High-Intensity Discharge (HID) bi-xenon headlights with integrated fog lamps. As with the new G35 Sedan, Infiniti developed a specialized production process for headlight installation to impart tight build tolerances and an exacting fit of the complex front fascia. The aluminum hood is secured by dual latches located at the two front corners to ensure an excellent fit.
The strong side character line and side sills integrate with the large wheel wells and the 18- or 19-inch performance-oriented wheel and tire packages to transmit an added sense of power and vibrancy.
The rear of the G Coupe features broad rear fenders, flowing into the large LED taillights – an Infiniti trademark, refined rear bumper, integrated RearView Monitor camera (when equipped), rear underbody air diffusers and large dual exhaust outlets with chrome finishers.
An available rear spoiler gives the G37 Coupe zero rear lift, matching the standard zero-lift front aerodynamics.
The G37 Coupe Sport 6MT models and G37 Journey with Sport Package add an enhanced performance look, with a unique front fascia, special side sills and standard 19-inch aluminum-alloy wheels with high performance tires.
Eight exterior colors, including two all-new colors, are offered.
A long bonnet, short overhangs and dramatically raked roof line give the G37 Coupé a silhouette that sets it apart from rival products based more heavily on their saloon counterparts.
Designed as a modern sports car without compromise, the G37 Coupé has elegant and sophisticated proportions allied to an expressive, curving shoulder-line to give a feeling of movement even when stationary. The shorter and lower roofline also helps accentuate the Coupé’s low centre of gravity and gives a clear indication that this is essentially a rear-wheel-drive car.
Curving ‘character’ lines at the front of the car mimic the lines of the front wings and help give the Coupé a more athletic and aggressive stance, while the wave-style aluminium bonnet incorporates a natural power dome to accentuate the potency of what lies beneath.
A special production process has been developed for installation of the headlights to ensure tight build tolerances and an exact fit into the complex front fascia.
Thanks to its shorter body, the Coupé’s rear shoulder is even more muscular than the Sedan’s, while the integral rear lip spoiler is more pronounced. The jewel-like taillights feature LED lamps to reinforce the Coupé’s high-tech appeal.
The 2009 G37 Coupe interior design features sophisticated craftsmanship, with a cockpit-oriented front driver and passenger area, Infiniti signature “double wave” instrument panel design featuring the Infiniti-signature analog clock and dramatic, full-length center console with a leather and aluminum-clad shifter. Special aluminum-alloy interior trim, inspired by elegant, handmade Japanese Washi paper, is located across the instrument panel, on the center console and on the door panels. Genuine African Rosewood trim is also available.
The instrument panel features Infiniti electroluminescent instrumentation with white-and-violet illumination and integrated multi-function information drive computer (average fuel consumption, real-time fuel economy, average speed, elapsed time, running distance, distance to empty, outside air temperature, warning displays, odometer and automatic transmission shift indicator) display.
Drivers grip a double hand-stitched leather-covered steering wheel, designed for maximum comfort and usability with wheel-mounted audio and cruise controls. Available genuine magnesium paddle shifters for the 5-speed automatic transmission fall readily to hand and add control (G37 Coupe Journey with Sport Package only).
The 8-way power driver and 4-way front passenger seats (8-way on G37 Coupe Journey, G37 Coupe Journey with Sport Package and G37 Coupe Sport 6MT model) are appointed with Infiniti’s exclusive premium leather and feature 2-way adjustable head restraints and a unique rear-seat access system, whereby the front seats will move forward automatically at the touch of a button to allow passengers into the rear seat.
The G37 Coupe Journey with Sport Package and G37 Coupe Sport 6MT add special 14-way sport-styled seats with thigh extensions and power adjustable torso and thigh bolsters for the driver, unique steering wheel stitching and high-grip aluminum pedals.
Technological and convenience features abound in the new G37 Coupe. Standard is the Infiniti Intelligent Key with push button ignition, Remote Keyless Entry system, a tilt/telescoping steering column with increased travel, illuminated glove compartment and automatic temperature control.
Also standard is a 6-speaker AM/FM/CD audio system with MP3 playback capability, Radio Data System (RDS) and center console-mounted auxiliary input, as well as a 7-inch color display.
Available is an 11-speaker Infiniti "Studio on Wheels"™ by Bose®, combining a 3-way front door speaker array using 10-inch woofers with an audiophile-quality head unit incorporating double oversampling 24-bit 96KHz Burr Brown® Digital Analogue Converters (DAC). Also available is a Bluetooth® hands-free phone system, new touch screen Infiniti Navigation System with available XM® NavTraffic™ real-time traffic information (subscription required), voice activation for navigation, audio and HVAC functions, and a 9.3-gigabyte Music Box hard drive with compact flash drive slot.
Three interior color combinations are offered – Wheat, Graphite and Stone.
Safety Performance and Technology
Available on the new G37 Coupe is an Adaptive Front lighting System (AFS), which automatically controls the headlight lighting pattern according to steering angle and vehicle speed to help provide better visibility at night.
Standard on all G37 Coupes is an Advanced Air Bag System (AABS) with dual-stage supplemental air bags with seat belt sensors and occupant classification sensor, front-seat side-impact supplemental air bags and roof-mounted side-impact curtain air bags for front- and rear-seat occupant head protection.
Also standard are 3-point ALR/ELR seat belts (driver’s side ELR only) and front seat belts with pretensioners and load limiters and adjustable upper anchors, driver and front-passenger knee bolsters, front seat Active Head Restraints and the LATCH (Lower Anchors and Tethers for CHildren) system. Available as part of the Technology Package are brake-operated pre-crash seat belts with motion sensor on the brake pedal.
The G37 Coupe features Zone Body Construction with front and rear crushable zones to help disperse crash energy around the passenger compartment. For occupant safety, the engine is designed to move under the occupant compartment in a high-speed frontal collision, while a breakaway construction of the propeller shaft (connected with the engine-drop function) and the double-wall construction of the bulkhead helps to minimize cabin deformation, especially in the lower leg area. In addition, the brake pedal is designed to collapse to help reduce lower leg injuries in a severe crash.
The G37 Coupé provides a sporting cockpit environment for the driver and a luxuriously open space for its passengers. The dashboard and centre console, complete with seven-inch colour display, adopts Infiniti design DNA with a ‘double wave’ upper section linked to a central vertical spine for a feeling of solidity. Textured aluminium trim inserts can be found on the centre console, the instrument binnacle and the door panels.
Its gracefully curved door trims have been inspired by traditional Japanese ceremonial swords, while the trim inserts are modeled on Japanese Washi handmade paper. Other signature Infiniti features are the elegant analogue clock on the dashboard and purple backlighting of instruments and controls.
Thanks to its long wheelbase, there is room in the rear compartment for two adults with easy ingress and egress provided by the wide opening doors and the electric fold and slide front seats. The practicality and loading capacity of G37 Coupé is further improved by the folding rear seats
Infiniti’s latest 3.7-litre V6 is a potent, high revving, 24-valve twin cam unit producing 235 kW at 7,000 rpm (320 PS) and an impressive 360 Nm of torque at 5,200 rpm.
Constructed from lightweight aluminium, the engine features a two-part bed-plate construction which is more rigid than a single piece casting for reduced vibration levels. It also permits sustained use at higher revs: the V6 is red-lined at 7,500rpm.
The VQ37 unit features VVEL (Variable Valve Event and Lift) technology to optimise efficiency and, in turn, the balance between power, response, fuel efficiency and emissions.
By continually altering valve lift and therefore the quantity of air in the combustion chamber it provides a more powerful combustion phase to increase torque and power. Best of all, as the valves control the intake rather than a conventional butterfly, response to throttle inputs is immediate. VVEL improves fuel economy and lowers emissions compared to standard valve lift systems
Precise mapping of the ECU, meanwhile, helps the engine provide a progressive ‘swell’ of power and torque, providing a ‘building wave’ of acceleration rather than a peaky power delivery.
It delivers a top speed of 250 km/h (155 mph) with 0-100 km/h (0-62 mph) taking 5.8 seconds (on M/T version). Fuel economy over the combined cycle is 10.5 l/100kms (26.9 mpg) while the Coupé has a CO2 figure of 249 g/km. The engine is fully compliant with Euro 5 emission level requirements.
In keeping with the performance profile of the Coupé, Infiniti engineers have developed a special aural soundtrack for the car. Equal length tubular exhaust manifolds and a symmetrical exhaust and silencer system have allowed the engineers to create a linear sound with a good balance between low and high frequency notes.
As well as a smooth shifting six-speed manual transmission, the G37 Coupé is available with a new seven-speed automatic option with Adaptive Shift Control (ASC) and magnesium paddle shifters mounted behind the steering wheel.
Chassis and driving dynamics
G37 Coupé uses the second-generation version of Infiniti’s FM platform. The ‘front midship’ engine location sees the compact V6 mounted in the front of the car, but as low and as far back as possible, with most of the block behind the front axle line. The result lowers the centre of gravity and helps to deliver the optimum front to rear weight distribution.
The fully independent suspension uses lightweight aluminium components to reduce weight as much as possible. A double wishbone set up at the front and a subframe-mounted multi-link arrangement at the rear allied to an extremely rigid body shell, gives the G37 Coupé agile handling perfectly in keeping with its performance potential.
All versions of G37 Coupé come with Electronic Stability Program (ESP), while the power-assisted four-wheel vented disc brakes have a four-channel, four-sensor Anti-lock Braking System (ABS), Electronic Brake force Distribution (EBD) and Brake Assist (BA) as standard.
To enhance the braking feel, the G37 Coupé uses a ‘link-design’ pedal which becomes progressively firmer as g-forces and vehicle speed increases. As a result, the driver has a more direct sensation of the forces acting on the car as he brakes from high speed, as well as the benefit of increased assistance. At lower speeds the brake is easier to operate but with more travel relative to assistance.
The power steering system is a vehicle-speed-sensing type with a twin-orifice structure, which provides optimum steering effort at both high and low vehicle speeds.
The sports oriented G37S version has a number of chassis changes in keeping with its sharper profile. The principal enhancement is the addition of the 4-Wheel Active Steer (4WAS) system which helps improve handling performance still further by varying the front steering ratio and adjusting the geometry of the rear suspension according to steering input and vehicle speed.
Other standard features of the G37S include a Viscous Limited Slip Differential, recalibrated suspension settings and an enhanced braking system with four piston front brakes and two piston rears.
G37 Coupé has a full complement of user friendly – and above all, useful – standard equipment, plus options for those who want to make even more of a statement.
Standard features include the intelligent I-key with smart access and push button starter, a six-disc, seven-speaker audio system with an RCA AUX-in jack socket for MP3 players. Bluetooth phone connectivity and cruise control with speed limiter can all be operated via switches on the leather-trimmed multi-function steering wheel.
Other standard features include power seats (with eight way adjustment on the driver’s side and four way for the passenger), aluminium pedals and footrest, auto-dimming rear view mirror, front and rear parking sensors, automatic lights and wipers, 18-inch alloy wheels, six airbags and integrated fog lamps. For the perfect driving position, the binnacle is attached not to the dashboard but to the steering column itself, and moves with the wheel when the latter is adjusted for reach and rake.
The Adaptive Front-light System (AFS) and “Scratch Shield” paint are also standard. Bi-Xenon headlamps are linked to steering inputs and automatically follow the path of the front wheels to provide a wide spread of light around corners and on winding roads. “Scratch Shield” paint incorporates a special highly elastic resin within the conventional clearcoat to increase the paint’s flexibility. A car painted with “Scratch Shield” paint can exhibit up to five times fewer scratches that a conventional clearcoat when exposed to the same conditions.
The G37 GT version adds extra comfort with leather upholstery, a 10-way power driver’s seat with lumbar support and memory and an 8-way powered passenger front seat. Heated front seats are also standard and the I-key incorporates memory positions for driver’s seat, steering wheel column and door mirrors.
In addition to its chassis and dynamic changes, the G37S adds a sports seat with manual thigh extension for the driver. The seats themselves are upholstered with leather as well as heated and have 14-way power adjustment (driver) and 8-way power adjustment (passenger). There’s a tyre pressure monitoring system as standard, plus 19-inch alloy sports wheels.
The major option is the new seven-speed automatic transmission with manual mode and magnesium paddle shifters, enabling drivers to shift the transmission without releasing their hands from the steering wheel. With its additional forward gear, the new automatic transmission has a wider spread of ratios which benefits both fuel consumption and drivability. The seventh speed is effectively an overdrive ratio, returning improved fuel economy on a steady throttle without compromising in-gear flexibility for overtaking. Shift points are tuned to keep the engine in the largest part of the torque curve, ensuring there is always a healthy reserve when the driver wants to overtake. The linked Adaptive Shift Control (ASC) system switches between three different programs depending on input from the major control systems throughout the car.
Other options include Intelligent Cruise Control (ICC) which uses brake, throttle and laser sensors to help maintain a set distance between the G37 Coupé and the car in front. In automatic transmission versions, the software reduces driver’s workload even more allowing ICC to work from 0km/h to 180 km/h thanks to the “Full Speed Range” feature. An integral part of the ICC option for A/T models, the Intelligent Brake Assist system analyses closing speeds to a vehicle ahead helping reduce damage caused by a rear-end collision. If the driver must take immediate action to avoid a collision, the system sounds a warning to prompt driver action or can even activate the brakes to decelerate the vehicle.
A custom-engineered Bose® sound system sets a new standard for stereo performance in a car. Its 11 high-performance speakers provide crisp musical detail, with impactful low notes bringing G Coupé owners closer to the power and emotion of a live concert performance. To achieve this, Bose® engineers used proprietary digital signal processing and multiple channels of custom equalization to help tune the sound specifically for the vehicle. The Bose® sound system is available as part of a Multimedia pack with also incorporates a DVD navigation system with voice recognition and a rear-view parking camera. Final options include an electric glass sunroof, metallic paint and a temporary spare wheel (replacing standard tyre repair kit), while a subtle African Rosewood trim interior is available on the G37 GT.
High levels of passive safety were a priority at the design stage. As a result, the G37 Coupé has a full complement of six airbags, with dual-stage front airbags, seat belt sensors and passenger seat occupancy sensor. The front seats incorporate hip and thorax bags, while there are front-to-rear curtain airbags for protection in a side impact.
Also standard is a pop-up bonnet, designed to offer greater crash protection for pedestrians. In the event of a collision, a small pyrotechnic charge raises the trailing edge of the bonnet close the lower edge of the windscreen. This creates a larger buffer between the bonnet and the top of the engine, providing a more yielding surface which in turn helps to reduce potential injuries.
Infiniti is synonymous with vehicle quality, and that’s something that doesn’t happen by accident.
On the Tochigi production line in Japan every vehicle – not just every tenth – is laser scanned to ensure that panel gaps are within prescribed limits.
During the design and development phase, new models are exhaustively tested not just at Infiniti’s Hokkaido proving ground but also at the Tochigi and Motegi test and race complexes in Japan. Infiniti also has a vast 12.34 million square metre hot weather testing base in Arizona.
Testing every Infiniti in the harshest of conditions and over thousands and thousands of kilometres ensures the durability and peace of mind that buyers can expect from the products.
Three Well-Equipped Models
The 2009 Infiniti G37 Coupe is available in three models: G37 Coupe, G37 Coupe Journey and G37 Coupe Sport 6MT. In addition to the long list of standard features on all three models, several options and packages are available.
These include the Premium Package, with a power sliding glass moonroof, 11-speaker Infiniti "Studio on Wheels"™ by Bose® audio system with iPod connection, memory system (drivers seat, steering wheel and outside mirrors) with synchronization, power tilt and telescoping steering wheel, anti-glare rearview mirror with compass and HomeLink© Universal Transceiver, Bluetooth® hands-free phone system, and heated front seats and door mirrors.
Also offered is the Sport Package (available on G37 Journey model and standard on G37 Coupe Sport 6MT), which includes 19-inch wheels and tires, Viscous Limited-Slip Differential (VLSD), sport-tuned suspension, sport brakes, unique front fascia and side sills, sport-styled seats and steering wheel stitching, aluminum pedals and paddle shifters (G37 Coupe Journey only).
The Infiniti Navigation Package adds an advanced navigation system with touch-screen capability, available XM® NavTraffic™ real-time traffic information (subscription required), voice activation for navigation, audio and HVAC functions and a 9.3-gigabyte Music Box hard drive with compact flash drive slot, and RearView Monitor. The Technology Package includes Infiniti Intelligent Cruise Control (ICC) with Preview Braking, Adaptive Front lighting System (AFS) and, available for the first time on G Coupe, a "Pre-Crash Seatbelt" system.
Also available is the Infiniti 4-Wheel Active Steer system; Performance Wheel and Tire Package with 19-inch high performance tires featuring lightweight cast aluminum-alloy wheels; Moonroof; Rear Spoiler; and African Rosewood interior trim.
"When the original G Coupe was introduced, it proved to the world that exhilarating sport coupe performance doesn’t have to come in a machine-like box," said Igo. "This new G37 Coupe, which we’re proudly showing for the first time anywhere in New York, is pure G and pure Infiniti – and ready to take center position on the world automotive stage."