The Infiniti Q70 5.6 V8 AWD Automatic, produced for the 2013 and 2014 model years, represented the pinnacle of performance and luxury within the Q70 (formerly M) sedan lineup. Positioned as the flagship trim, it catered to buyers seeking a powerful, all-weather capable luxury vehicle. This variant built upon the foundation of the Y51 chassis, introduced in 2002, receiving significant updates throughout its lifecycle, culminating in the 2013 refresh that brought enhanced styling and technology. The Q70 5.6 V8 aimed to compete with established luxury sedans from German and American manufacturers, offering a unique blend of Japanese engineering and American-market sensibilities.
Technical Specifications
| Brand | Infiniti |
| Model | Q70 |
| Type (Engine) | 5.6 V8 (420 Hp) AWD Automatic |
| Start of production | 2013 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (EPA) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (economy) – combined (EPA) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 4.6 kg/Hp, 219.8 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 295.7 Nm/tonne |
| Power | 420 Hp @ 6000 rpm |
| Power per litre | 75.6 Hp/l |
| Torque | 565 Nm @ 4400 rpm (416.72 lb.-ft. @ 4400 rpm) |
| Maximum engine speed | 6700 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, CVTCS |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant | 10.9 l (11.52 US qt | 9.59 UK qt) |
| Kerb Weight | 1911 kg (4213.03 lbs.) |
| Max. weight | 2395 kg (5280.07 lbs.) |
| Max load | 484 kg (1067.04 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 | 4945 mm (194.69 in.) |
| Width | 1845 mm (72.64 in.) |
| Height | 1515 mm (59.65 in.) |
| Wheelbase | 2900 mm (114.17 in.) |
| Front track | 1575 mm (62.01 in.) |
| Rear (Back) track | 1565 mm (61.61 in.) |
| Ride height (ground clearance) | 145 mm (5.71 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, automatic transmission |
| Front suspension | Double wishbone, Independent coil spring, Transverse stabilizer |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 320×28 mm |
| Rear brakes | Ventilated discs, 308×15 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/50 R18; 245/40 R20 |
| Wheel rims size | 8J x 18; 9J x 20 |
Powertrain & Engine Architecture
The heart of the Q70 5.6 V8 is the VK56VD engine, a 5.6-liter naturally aspirated V8. This engine is a descendant of the VK56DE, but incorporates Nissan’s Variable Valve Event and Lift (VVEL) technology and Continuously Variable Valve Timing Control System (CVTCS) for improved efficiency and performance. The VK56VD utilizes direct fuel injection, enhancing combustion efficiency and contributing to its 420 horsepower output at 6000 rpm and 416.72 lb-ft of torque at 4400 rpm. The engine’s architecture is a 60-degree V-angle, providing a balance between smoothness and compactness. Paired with the engine is a seven-speed automatic transmission, providing smooth and responsive shifts. This transmission was tuned for a balance of performance and comfort, prioritizing a refined driving experience over aggressive gear changes.
Driving Characteristics
The Q70 5.6 V8 AWD delivers a distinctly different driving experience compared to the lower-trim models. The substantial torque output of the V8 engine provides effortless acceleration in all conditions. While not a sports sedan in the purest sense, the Q70 5.6 V8 offers brisk performance, capable of 0-60 mph times in the low-5 second range. The all-wheel-drive system provides enhanced traction, particularly in inclement weather, making it a confident performer year-round. The seven-speed automatic transmission is well-matched to the engine, offering smooth shifts and a relatively quick response. Compared to the 3.7-liter V6 models, the 5.6 V8 offers a more substantial and refined power delivery, albeit at the cost of increased fuel consumption.
Equipment & Trim Levels
The Q70 5.6 V8 AWD Automatic came standard with a comprehensive list of features, befitting its flagship status. Standard equipment included leather upholstery, heated and ventilated front seats, a power-adjustable steering wheel, a premium Bose audio system, and a navigation system. Available options included a rear-seat entertainment system, semi-aniline leather, and advanced climate control features. The interior design emphasized luxury and comfort, with high-quality materials and a focus on creating a serene cabin environment. Exterior features included unique alloy wheel designs and chrome accents, differentiating it from the lower trims.
Chassis & Braking
The Q70 5.6 V8 utilizes a double-wishbone front suspension and an independent multi-link rear suspension, tuned for a comfortable ride without sacrificing handling precision. Stabilizer bars are fitted to both axles to minimize body roll during cornering. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. The all-wheel-drive system employs an electronically controlled clutch to distribute torque between the front and rear axles, optimizing traction based on driving conditions. The Q70 5.6 V8’s chassis was designed to provide a stable and predictable driving experience, prioritizing comfort and refinement over outright sportiness.
Market Reception & Comparison
Critics generally praised the Q70 5.6 V8 for its powerful engine, comfortable ride, and luxurious interior. However, some reviewers noted that its handling wasn’t as sharp as some of its European competitors. Fuel economy was also a common criticism, given the engine’s large displacement and naturally aspirated design. Compared to the Q70 3.7, the 5.6 V8 offered significantly more performance but came at a higher price point and with increased running costs. Against rivals like the BMW 550i and Mercedes-Benz E550, the Q70 5.6 V8 offered a compelling value proposition, providing similar levels of luxury and performance at a potentially lower price.
Legacy
The Infiniti Q70 5.6 V8 AWD Automatic, while a relatively short-lived model, remains a desirable vehicle in the used car market. The VK56VD engine is known for its reliability, provided it receives regular maintenance. Common issues include oil consumption and potential for timing chain wear at very high mileage. The Q70 5.6 V8 represents a unique offering in the luxury sedan segment, combining Japanese engineering with American-market preferences for a powerful and comfortable driving experience. Its blend of performance, luxury, and all-weather capability continues to appeal to enthusiasts seeking a distinctive and capable grand tourer.
