The Infiniti Q70L (facelift, introduced in 2014) with the 5.6-liter V8 engine and all-wheel drive represents the pinnacle of the Q70 lineup. Produced from 2014 through 2018, this variant was positioned as a luxury performance sedan aimed at buyers seeking a spacious, powerful, and technologically advanced vehicle. The “L” designation signifies a long-wheelbase version, offering increased rear passenger legroom compared to the standard Q70. This model competed primarily with established luxury sedans such as the Lexus GS, Acura RLX, and the larger offerings from BMW and Mercedes-Benz.
Technical Specifications
| Brand | Infiniti |
| Model | Q70 |
| Generation | Q70L (facelift 2014) |
| Type (Engine) | 5.6 V8 (416 Hp) AWD Automatic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 4.7 kg/Hp, 211.9 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 285.8 Nm/tonne |
| Power | 416 Hp @ 6000 rpm |
| Power per litre | 74.9 Hp/l |
| Torque | 561 Nm @ 4400 rpm (413.77 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VK56VD |
| Engine displacement | 5552 cm3 (338.8 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 98 mm (3.86 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 11.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, VVEL |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant capacity | 10.9 l (11.52 US qt | 9.59 UK qt) |
| Kerb Weight | 1963 kg (4327.67 lbs.) |
| Trunk (boot) space (minimum) | 422 l (14.9 cu. ft.) |
| Fuel tank capacity | 76 l (20.08 US gal | 16.72 UK gal) |
| Length | 5131 mm (202.01 in.) |
| Width | 1844 mm (72.6 in.) |
| Height | 1514 mm (59.61 in.) |
| Wheelbase | 3051 mm (120.12 in.) |
| Front track | 1575 mm (62.01 in.) |
| Rear track | 1570 mm (61.81 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle | 11.4 m (37.4 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission ASC |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/50 R18 |
| Wheel rims size | 8J x 18 |
INTRODUCTION
The Infiniti Q70L 5.6 V8 AWD Automatic, introduced with the 2014 facelift, represented a significant upgrade to the M56 (pre-facelift name) model. The Q70L, built on the Nissan FM platform (also known as the 1HX0/A3 platform), aimed to provide a compelling blend of luxury, performance, and technology. The long-wheelbase configuration was specifically tailored for markets where rear passenger comfort was highly valued, though it was also offered in the US market. This variant sat at the top of the Q70 range, offering a substantial power advantage over the 3.7-liter V6 models and a more luxurious experience than the standard wheelbase Q70.
Powertrain & Engine Architecture
At the heart of the Q70L 5.6 is the VK56VD engine, a 5.6-liter naturally aspirated V8. This engine is a descendant of the original VK56DE, but incorporates Nissan’s Variable Valve Event and Lift (VVEL) technology for improved efficiency and responsiveness. VVEL continuously adjusts valve timing and lift based on driving conditions, optimizing both power and fuel economy. The engine utilizes direct fuel injection, further enhancing combustion efficiency. The VK56VD produces 416 horsepower at 6000 rpm and 414 lb-ft of torque at 4400 rpm. The engine is paired with a 7-speed automatic transmission (ASC), designed for smooth and responsive shifting. This transmission features adaptive shift control, adjusting shift points based on driving style and conditions. The all-wheel-drive system is a sophisticated setup that actively distributes torque between the front and rear axles, enhancing traction and stability in various weather conditions.
Driving Characteristics
The Q70L 5.6 V8 AWD delivers a distinctly smooth and powerful driving experience. The naturally aspirated V8 provides ample torque throughout the rev range, resulting in strong acceleration. While not as overtly sporty as some of its European rivals, the Q70L offers a refined and comfortable ride. The 7-speed automatic transmission contributes to this smoothness, providing seamless gear changes. Compared to the 3.7-liter V6 models, the V8 offers a significant performance advantage, particularly in highway passing situations. The all-wheel-drive system provides enhanced grip and stability, especially in inclement weather. The long wheelbase contributes to a more stable and composed ride, although it does slightly reduce agility compared to the standard wheelbase Q70.
Equipment & Trim Levels
The Q70L 5.6 V8 AWD typically came well-equipped with standard features including leather upholstery, heated and ventilated front seats, a premium Bose audio system, a navigation system, and a suite of advanced safety technologies. Available options included a rear-seat entertainment system, semi-aniline leather, and various driver-assistance features. The interior design emphasized luxury and comfort, with high-quality materials and a spacious cabin. The long wheelbase provided generous rear legroom, making it a comfortable choice for passengers.
Chassis & Braking
The Q70L utilizes a double wishbone front suspension and an independent multi-link rear suspension, both designed to provide a comfortable and controlled ride. Stabilizer bars are fitted to both axles to reduce body roll during cornering. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) and electronic brake-force distribution are standard features. The steering is a rack-and-pinion system with electric power assistance, offering a responsive and precise feel.
Market Reception & Comparison
Critics generally praised the Q70L 5.6 V8 AWD for its powerful engine, comfortable ride, and spacious interior. However, some reviewers noted that the interior design felt somewhat dated compared to newer luxury sedans. Fuel economy was also a common criticism, as the large V8 engine consumed a significant amount of fuel. Compared to the 3.7-liter V6 models, the V8 offered a substantial performance upgrade but came at a higher price and with lower fuel efficiency. The Q70L’s all-wheel-drive system provided a competitive advantage in regions with harsh winters or inclement weather.
Legacy
The Infiniti Q70L 5.6 V8 AWD remains a relatively reliable vehicle, although maintenance costs can be higher due to the complexity of the V8 engine and the availability of parts. The VK56VD engine is generally considered to be a durable and long-lasting powerplant, but regular maintenance is crucial. On the used car market, these models hold their value reasonably well, particularly those in good condition with low mileage. The Q70L represents a final expression of Infiniti’s commitment to large, luxurious, and powerful sedans, and it continues to appeal to buyers seeking a unique and refined driving experience.
