2014-2018 Infiniti Q70L (facelift ) 5.6 V8 (416 Hp) Automatic

The Infiniti Q70L (facelift, introduced in 2014) with the 5.6-liter V8 engine and 7-speed automatic transmission represents the top-tier performance offering within the Q70 lineup during its final production years (2014-2018). Positioned as a luxury performance sedan, the Q70L aimed to compete with established German rivals like the BMW 5 Series and Mercedes-Benz E-Class, offering a spacious interior and a powerful engine. The “L” designation signifies a long-wheelbase version, primarily targeted at markets where rear passenger space is highly valued, though it was also available in the US. This variant was the flagship of the Q70 range, offering a significant step up in power and refinement compared to the 3.7-liter V6 models.

Technical Specifications

INTRODUCTION

The 2014-2018 Infiniti Q70L 5.6 V8 Automatic represents a significant evolution of the M56, rebranded as the Q70 with the facelift. The Q70L, specifically, was designed to appeal to buyers seeking a luxurious and powerful rear-wheel-drive sedan. Built on the Nissan FM platform (also known as the 1HX0/A3 platform), the Q70L offered a longer wheelbase than the standard Q70, providing increased rear legroom. This model year saw a refreshed exterior design, incorporating Infiniti’s then-current design language, and updated interior features. The 5.6L V8 was the range-topping engine option, offering a substantial performance advantage over the 3.7L V6 models.

Powertrain & Engine Architecture

At the heart of the Q70L 5.6 is the VK56VD engine, a 5.6-liter naturally aspirated V8. This engine utilizes direct fuel injection, a double overhead camshaft (DOHC) valvetrain, and Variable Valve Event and Lift (VVEL) technology. VVEL continuously adjusts valve timing and lift, optimizing engine performance and efficiency across a wide range of operating conditions. The VK56VD produces 416 horsepower at 6000 rpm and 414 lb-ft of torque at 4400 rpm. The engine is longitudinally mounted, driving the rear wheels. Paired with the VK56VD is a 7-speed automatic transmission (ASC), offering smooth and responsive shifts. This transmission features adaptive shift control, adjusting shift points based on driving conditions and driver input. While not a dual-clutch transmission, the ASC provides quick and precise gear changes, contributing to the Q70L’s overall driving experience.

Driving Characteristics

The Q70L 5.6 V8 Automatic delivers a refined and powerful driving experience. The substantial torque output of the VK56VD engine provides effortless acceleration in most driving situations. The 7-speed automatic transmission is well-tuned, offering smooth upshifts and downshifts. Compared to the 3.7L V6 models, the V8 offers a noticeably more authoritative and responsive feel. The longer wheelbase of the Q70L contributes to a comfortable ride, absorbing bumps and imperfections in the road effectively. However, the added weight of the V8 engine and longer wheelbase does result in slightly less agile handling compared to the standard Q70. The gear ratios are optimized for both cruising comfort and responsive acceleration, with a focus on providing a relaxed driving experience on the highway.

Equipment & Trim Levels

The Q70L 5.6 V8 Automatic typically came well-equipped with standard features including leather upholstery, heated and ventilated front seats, a premium audio system (often Bose), a navigation system, and a suite of advanced safety technologies. Available options included a rear-seat entertainment system, a panoramic sunroof, and advanced driver-assistance features like lane departure warning and intelligent cruise control. Interior trim options typically included wood or aluminum accents. The Q70L was positioned as a premium offering, and as such, the standard equipment level was relatively high. The focus was on providing a luxurious and comfortable interior environment.

Chassis & Braking

The Q70L utilizes a double wishbone front suspension and an independent multi-link rear suspension, both incorporating stabilizer bars to minimize body roll. The suspension is tuned for a balance of comfort and handling. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) is standard, along with Electronic Brake-force Distribution (EBD) and Brake Assist. The steering system is a rack-and-pinion setup with electric power steering, offering precise and responsive steering feel. The Q70L typically came equipped with 18-inch alloy wheels and 245/50 R18 tires.

Market Reception & Comparison

The Infiniti Q70L 5.6 V8 Automatic received generally positive reviews from automotive critics. The engine was praised for its smooth power delivery and refined character. The spacious interior and comfortable ride were also highlighted as strengths. However, some critics noted that the Q70L’s styling was becoming dated compared to newer competitors. Fuel economy was also a concern, as the 5.6L V8 is not particularly fuel-efficient. Compared to the 3.7L V6 models, the V8 offered a significant performance upgrade but came at the cost of increased fuel consumption and a slightly higher price. Against its German rivals, the Q70L offered a compelling value proposition, providing similar levels of luxury and performance at a lower price point.

Legacy

The Infiniti Q70L 5.6 V8 Automatic, while not a high-volume seller, has developed a following among enthusiasts who appreciate its powerful engine and comfortable ride. The VK56VD engine is known for its reliability, although regular maintenance is essential. On the used car market, the Q70L 5.6 typically commands a higher price than the V6 models. The long-term reliability of the 7-speed automatic transmission is generally good, but some owners have reported issues with the transmission control module. Overall, the Q70L 5.6 V8 Automatic represents a compelling option for buyers seeking a spacious, powerful, and relatively affordable luxury sedan.