2015 Infiniti Q70: Luxury Performance Redefined

The automotive luxury segment has long been dominated by established European brands, yet the 2015 Infiniti Q70 presents a compelling alternative that challenges conventional wisdom about where premium midsize sedans come from. Following its rebrand from the M-series nameplate, the Q70 arrived with refinements and a new extended wheelbase option that expanded its appeal beyond traditional Infiniti enthusiasts. This comprehensive examination reveals why the Q70 deserves recognition as a serious competitor in a category typically reserved for German marques.

Evolution in Design and Exterior Presentation

The 2015 model year introduced meaningful aesthetic updates that modernized the Q70’s visual identity without abandoning its distinctive character. The front fascia received a more contemporary treatment, featuring redesigned headlight clusters and a revised lower grille that projects authority without excessive aggression. At the rear, updated taillamp graphics and refined bodywork create a more cohesive visual narrative that flows naturally from front to back.

What truly distinguishes the 2015 Q70 is its proportional elegance—a quality often overlooked in discussions of luxury sedans that prioritize bulk over balance. The vehicle’s dimensions place it in direct competition with the BMW 7-Series and Mercedes-Benz E-Class, yet its styling language remains distinctly Japanese, eschewing the conventional design formulas adopted by competitors. This individuality in appearance appeals to buyers seeking differentiation without sacrificing the prestige associated with established luxury nameplates.

The Game-Changing Long-Wheelbase Architecture

For 2015, Infiniti introduced the Q70L, a long-wheelbase variant that stretched the rear passenger compartment by 5.9 inches while adding less than 100 pounds to the overall curb weight. This engineering accomplishment addresses a fundamental criticism levied against the standard model—limited rear legroom for adult passengers on extended journeys.

The Q70L’s extended architecture delivers rear knee room that surpasses the BMW 5-Series, Audi A6, Cadillac CTS, Mercedes-Benz E-Class, and Lexus GS. Beyond mere statistics, the psychological benefit of genuine spaciousness transforms the passenger experience during lengthy commutes or professional transportation scenarios. The longer doors on the Q70L appear visually proportionate rather than awkwardly stretched, creating an understated elegance that justifies the extended platform.

However, the long-wheelbase model does present notable compromises. Infiniti’s decision to exclude rear climate controls, heated and ventilated rear seats, footrests, and a dedicated rear entertainment system from even higher trim levels represents a missed opportunity to leverage the platform’s enhanced practicality. Buyers expecting comprehensive rear-passenger amenities typical of competitors may find these absences disappointing.

Interior Environment and Comfort Considerations

Stepping into the Q70’s cabin immediately communicates craft and material quality. The leather-wrapped instrument binnacle featuring exposed contrast stitching, padded knee protectors at the lower console, and soft-touch surfaces throughout establish an atmosphere of considered luxury. The 10-way power-adjustable front seats with heating and cooling functions provide exceptional comfort support during extended driving sessions, with bolstering that effectively prevents excessive movement during spirited cornering.

The interior architecture retains design elements carried over from previous model years, which creates a double-edged situation. While the cabin clearly demonstrates durability in its design philosophy and material selections, certain interface elements—particularly the gauge cluster and touchscreen infotainment system—begin displaying their age against newer competitors’ increasingly sophisticated digital presentations. The eight-inch touchscreen, though functional, lacks the touch responsiveness and visual clarity of contemporary navigation systems, potentially affecting perceived modernity despite the vehicle’s other refinements.

Acoustic management receives particular attention through active noise cancellation technology and a 16-speaker Bose surround-sound audio system positioned as optional enhancements. The quality of ambient sound engineering elevates cabin quietude, particularly noticeable during highway cruising where tire and wind noise typically intrude.

Power Plant Options and Transmission Characteristics

The 2015 Q70 lineup encompasses multiple powertrain configurations designed to accommodate diverse buyer preferences and priorities. The base engine is a 3.7-liter naturally aspirated V6 producing 330 horsepower and 270 pound-feet of torque. This engine pairs exclusively with a seven-speed automatic transmission featuring manual shift capability, directing power through either rear-wheel or available all-wheel drive configurations.

This V6 demonstrates respectable responsiveness when pressed for acceleration, with the seven-speed transmission responding quickly to wide-open throttle inputs. However, engine character—particularly the naturally aspirated induction note—proves divisive among automotive critics and potential buyers. Some appreciate the mechanical authenticity of a naturally aspirated unit, while others perceive harshness in the engine’s character compared to turbocharged alternatives.

An available V8 variant, the Q70 5.6, provides enhanced performance capability for buyers prioritizing acceleration and engine presence. The hybrid option delivers improved fuel economy for environmentally conscious buyers seeking efficiency without sacrificing the midsize luxury sedan format.

Powertrain Efficiency Metrics:

Ride Quality and Suspension Dynamics

Previous model years of the Infiniti M-series received criticism for excessive ride harshness, particularly when equipped with performance-oriented suspension settings. For 2015, engineers substantially addressed this concern, with ride quality now ranking among the Q70’s strongest attributes. The standard suspension geometry absorbs road imperfections effectively, translating road surfaces with composure rather than transmitting every undulation into the passenger compartment.

When equipped with the sport suspension option, models communicate increased road feedback while maintaining composure and avoiding the harshness that plagued earlier iterations. The active trace control system automatically engages interior or exterior brakes during cornering to optimize the vehicle’s trajectory, particularly beneficial on tight switchback roads where precision handling enhances both safety and driving enjoyment.

Steering characteristics reflect moderate weighting that feels appropriately responsive without excessive feedback harshness. The standard 14-inch front and 13.8-inch rear disc brakes, featuring four-piston and two-piston calipers respectively, deliver confident stopping power with linear pedal feel that inspires driver confidence during emergency deceleration scenarios.

Safety Architecture and Protective Technologies

Infiniti equipped the 2015 Q70 with comprehensive safety features addressing both collision prevention and occupant protection. Advanced driver assistance systems include adaptive cruise control with full-speed range operation, lane departure warning and prevention systems, blind-spot warning and intervention technologies, and back-up collision intervention. These systems work in concert to mitigate accidents through early warning and, when necessary, automatic intervention.

The Around View monitor with moving object detection and lane-guidance assistance provides 360-degree visibility during parking maneuvers, addressing one of the Q70’s size-related vulnerabilities. Front and rear parking sonar augment visual systems, creating multiple layers of protective technology for collision avoidance in low-speed scenarios.

Practical Cargo and Storage Considerations

The Q70’s cargo hold accommodates 14.9 cubic feet with all rear seats in place, offering adequate capacity for typical luxury sedan usage scenarios—weekend luggage, golf equipment, or business travel necessities. The powered trunk lid with automatic closing assist demonstrates Infiniti’s attention to convenience details, eliminating manual closure requirements that some buyers find tedious on frequent trips.

Interior storage compartments throughout the cabin provide designated spaces for personal items, with the quality leather-wrapped surfaces suggesting durability and intentional design rather than afterthought accommodation of essential functionality.

Climate Management and Environmental Systems

The Q70 incorporates dual-zone automatic climate control enabling driver and passenger independent temperature management. Rain-sensing variable intermittent wipers automatically adjust to moisture intensity, eliminating manual adjustment during changing weather conditions. The powered glass sunroof with automatic closure assist and powered rear sunshade enhance interior environment customization while maintaining weather sealing integrity.

Notably, the Q70L does not incorporate regenerative braking or automatic engine start-stop functionality present in some European competitors, limiting its environmental advantage despite aerodynamic refinements reducing drag coefficients.

Connectivity and Infotainment Integration

The Infiniti Connection telematics system provides remote vehicle monitoring and diagnostic capabilities, allowing owners to track vehicle status and receive maintenance alerts through smartphone connectivity. The eight-inch touchscreen navigation system featuring NavTraffic real-time traffic information and voice recognition enables hands-free operation of fundamental functions.

Bluetooth audio streaming, auxiliary input, and USB connectivity accommodate various audio source preferences, while satellite radio provision offers subscription-based entertainment options. The voice recognition system enables navigation input and telephone contact management without manual input, supporting safer operation during driving.

Comparative Market Position and Value Proposition

Within the luxury sedan category, the Q70 occupies an interesting position—offering space and appointments approaching full-size luxury vehicles while maintaining midsize agility and operational costs. The long-wheelbase model’s superior rear-seat legroom compared to traditional competitors provides tangible functional advantage for buyers prioritizing passenger comfort.

Pricing structures place the Q70 competitively within the segment, with base MSRP beginning at $49,850 before destination charges, offering entry-level accessibility to luxury positioning. Higher trim levels and extended wheelbase configurations command premium pricing reflecting enhanced appointments and spatial benefits.

Ownership Experience and Real-World Assessment

Owner satisfaction ratings reflect positive reception, with particular appreciation for second-row seat comfort, ingress and egress ease, and climate system functionality. These real-world insights validate manufacturer claims regarding practical design considerations extending beyond marketing positioning.

The 2015 Q70 delivers a compelling ownership experience balancing performance expectations with daily practicality requirements. Its Japanese engineering reliability tradition merges with luxury appointments and genuine technological advancement, creating an alternative narrative to traditional German luxury dominance.