The Infiniti QX70 5.0 V8, produced from 2013 onwards, represents a performance-oriented iteration of Infiniti’s mid-size luxury SUV. Positioned as the flagship trim within the QX70 range, it offered a substantial power upgrade over the 3.7-liter V6 models, targeting buyers seeking a blend of luxury, capability, and spirited driving dynamics. The QX70 itself was a rebadged and significantly revised version of the earlier FX35 and FX50, continuing a lineage of distinctive, coupe-like SUVs from the Japanese automaker. This variant, with its naturally aspirated 5.0-liter V8 and seven-speed automatic transmission, aimed to compete with similarly positioned SUVs from European and domestic manufacturers.
Technical Specifications
| Brand | Infiniti |
| Model | QX70 |
| Type (Engine) | 5.0 V8 (390 Hp) Automatic AWD |
| Start of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 19.2 l/100 km (12.3 US mpg) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg) |
| Fuel consumption (combined) | 13.5 l/100 km (17.4 US mpg) |
| CO2 emissions | 316 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 240 km/h (149.13 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.4 kg/Hp |
| Weight-to-torque ratio | 4.2 kg/Nm |
| Power | 390 Hp @ 6500 rpm |
| Torque | 500 Nm @ 4400 rpm (368.78 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VK50VE |
| Engine displacement | 5026 cm3 (306.71 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Fuel injection system | Direct injection |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant capacity | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 2120 kg (4673.8 lbs.) |
| Trunk (boot) space (minimum) | 410 l (14.48 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4865 mm (191.54 in.) |
| Width (including mirrors) | 2134 mm (84.02 in.) |
| Height | 1680 mm (66.14 in.) |
| Wheelbase | 2885 mm (113.58 in.) |
| Front track | 1635 mm (64.37 in.) |
| Rear track | 1640 mm (64.57 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle | 11.2 m (36.75 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
Powertrain & Engine Architecture
The heart of the QX70 5.0 V8 is the VK50VE engine, a 5.0-liter naturally aspirated V8. This engine utilizes Infiniti’s Variable Valve Event and Lift (VVEL) technology, a continuously variable valve timing and lift system. VVEL allows for precise control of valve opening and closing, optimizing engine performance and efficiency across a wide range of engine speeds. Direct fuel injection further enhances combustion efficiency and power output. The engine produces 390 horsepower at 6500 rpm and 368 lb-ft of torque at 4400 rpm. This power is channeled through a seven-speed automatic transmission, featuring manual shift mode and adaptive learning capabilities. The transmission is designed to provide smooth and responsive gear changes, complementing the engine’s power delivery. All-wheel drive is standard, utilizing an advanced torque split system to distribute power between the front and rear axles for optimal traction and stability.
Driving Characteristics
The QX70 5.0 V8 delivers a noticeably more engaging driving experience compared to the V6 models. The substantial torque output of the V8 engine provides strong acceleration in all gears, with a 0-60 mph time of around 5.5 seconds. The seven-speed automatic transmission is well-tuned, offering quick and precise shifts. While not as fuel-efficient as the V6, the V8 provides a satisfying exhaust note and a more visceral driving experience. The all-wheel-drive system provides confident handling in various weather conditions. Compared to the 3.7-liter models, the V8 QX70 feels significantly more powerful and responsive, making it a more appealing choice for drivers prioritizing performance.
Equipment & Trim Levels
The QX70 5.0 V8 typically came well-equipped with standard features including leather upholstery, heated and ventilated front seats, a power-adjustable steering wheel, a premium audio system, and a navigation system. Standard safety features included a rearview camera, parking sensors, and a suite of airbags. Optional extras included a panoramic sunroof, adaptive cruise control, lane departure warning, and blind-spot monitoring. The interior design featured a driver-focused layout with high-quality materials and a comfortable cabin. Trim levels were relatively streamlined, with the 5.0 V8 representing the top-of-the-line offering.
Chassis & Braking
The QX70 features a robust chassis with a double wishbone front suspension and an independent multi-link rear suspension. This suspension setup is tuned to provide a balance between ride comfort and handling performance. Ventilated disc brakes are used on all four wheels, providing ample stopping power. The braking system is enhanced by an anti-lock braking system (ABS) and electronic brake-force distribution (EBD). The QX70’s relatively heavy curb weight (around 4674 lbs) necessitates the robust braking system to ensure confident stopping performance.
Market Reception & Comparison
The Infiniti QX70 5.0 V8 was generally well-received by automotive critics, who praised its powerful engine, comfortable interior, and distinctive styling. However, its fuel economy was often cited as a drawback. Compared to competitors like the BMW X5, Porsche Cayenne, and Acura MDX, the QX70 offered a unique blend of performance and value. The V8 model stood out for its naturally aspirated engine, which some reviewers preferred over the turbocharged engines found in many competitors. Reliability reports suggest that the VK50VE engine is generally reliable, although routine maintenance is essential.
Legacy
The Infiniti QX70 5.0 V8 remains a desirable vehicle in the used car market, particularly for those seeking a powerful and stylish SUV. The VK50VE engine is known for its durability and relatively straightforward maintenance. While fuel economy is not its strong suit, the QX70 5.0 V8 offers a compelling combination of performance, luxury, and value. Its distinctive styling and engaging driving dynamics continue to appeal to enthusiasts, ensuring its place as a memorable offering in the mid-size luxury SUV segment.
