The Infiniti QX80 (Z63) 3.5 V6, introduced for the 2024 model year, represents the latest iteration of Infiniti’s full-size luxury SUV. Positioned as the flagship model in Infiniti’s lineup, the Z63 generation builds upon the foundation of its predecessor, offering a blend of opulent comfort, robust capability, and advanced technology. This particular variant, equipped with the 3.5-liter twin-turbocharged V6 engine and a nine-speed automatic transmission, serves as the primary powertrain offering for the North American market. The QX80 competes directly with vehicles like the Cadillac Escalade, Lincoln Navigator, and Lexus LX, aiming to provide a distinctive alternative with its Japanese engineering and styling.
Technical Specifications
| Brand | Infiniti |
| Model | QX80 |
| Generation | QX80 (Z63) |
| Type (Engine) | 3.5 V6 (450 Hp) Automatic |
| Start of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7-8 |
| Doors | 5 |
| 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) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 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) |
| Emission standard | LEV3-ULEV50 |
| Power | 450 Hp @ 5600 rpm |
| Power per litre | 128.9 Hp/l |
| Torque | 700 Nm @ 3600 rpm (516.29 lb.-ft. @ 3600 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | VR35DDTT |
| Engine displacement | 3492 cm3 (213.09 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 100.2 mm (3.94 in.) |
| Compression ratio | 10.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 16.3 l (17.22 US qt | 14.34 UK qt) |
| Trunk (boot) space – minimum | 623 l (22 cu. ft.) |
| Trunk (boot) space – maximum | 2860 l (101 cu. ft.) |
| Fuel tank capacity | 89 l (23.51 US gal | 19.58 UK gal) |
| Permitted trailer load with brakes (12%) | 3856 kg (8501.02 lbs.) |
| Length | 5364 mm (211.18 in.) |
| Width with mirrors folded | 2116 mm (83.31 in.) |
| Width including mirrors | 2350 mm (92.52 in.) |
| Height | 1946-1979 mm (76.61 – 77.91 in.) |
| Wheelbase | 3073 mm (120.98 in.) |
| Front track | 1727 mm (67.99 in.) |
| Rear (Back) track | 1730 mm (68.11 in.) |
| Ride height (ground clearance) | 244-254 mm (9.61 – 10 in.) |
| Drag coefficient (Cd) | 0.37 |
| Approach angle | 22.1-25.1° |
| Departure angle | 21.8-25.6° |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 9 gears, automatic transmission |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer, Air Suspension – Optional |
| Rear suspension | Double wishbone, Transverse stabilizer, Coil spring, Air Suspension – Optional |
| Front brakes | Ventilated discs, 350×30 mm |
| Rear brakes | Ventilated discs, 350×20 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 275/60 R20; 275/50 R22 |
| Wheel rims size | 8J x 20; 8J x 22 |
Powertrain & Engine Architecture
The heart of the QX80 is the VR35DDTT 3.5-liter V6 engine. This engine utilizes a 60-degree V-configuration, maximizing balance and smoothness. The “DDTT” designation signifies its dual-turbocharger setup, employing two Mitsubishi TD06H turbochargers to significantly boost power output. Direct injection is employed to precisely meter fuel into the combustion chambers, enhancing efficiency and responsiveness. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for increased performance. The nine-speed automatic transmission, sourced from ZF, is a crucial component of this powertrain. It provides a wide range of gear ratios, contributing to both fuel efficiency and strong acceleration. The transmission is designed for smooth and quick shifts, enhancing the overall driving experience.
Driving Characteristics
The 450 horsepower and 700 Nm (516 lb-ft) of torque delivered by the 3.5L V6 and nine-speed automatic combination provide the QX80 with substantial performance. While not a sports car, the QX80 offers confident acceleration for highway merging and passing maneuvers. The automatic transmission is tuned for comfort and refinement, with smooth gear changes. Compared to potential future higher-output variants, this configuration prioritizes a balance between power and fuel economy. The rear-wheel-drive layout contributes to a more traditional SUV feel, while available four-wheel drive enhances traction in inclement weather conditions. The wide gear ratio spread of the nine-speed transmission allows the engine to operate efficiently at cruising speeds, helping to mitigate some of the fuel consumption concerns associated with a large, heavy SUV.
Equipment & Trim Levels
The 2024 QX80 3.5 V6 Automatic comes standard with a comprehensive suite of features, including a 12.3-inch touchscreen infotainment system, wireless Apple CarPlay and Android Auto compatibility, a premium sound system, leather upholstery, and a power-adjustable driver’s seat. Higher trim levels add features such as quilted leather seats, a rear-seat entertainment system, and advanced driver-assistance systems like adaptive cruise control and lane-keeping assist. Optional extras include a panoramic sunroof, a refrigerated center console box, and a hydraulic body motion control system for enhanced ride comfort. The interior design emphasizes luxury and spaciousness, with seating for up to eight passengers depending on the configuration.
Chassis & Braking
The QX80 utilizes a body-on-frame construction, providing a robust and durable platform. The suspension system consists of double wishbones at both the front and rear, with optional air suspension available on higher trims. The air suspension allows for adjustable ride height and damping, enhancing both comfort and off-road capability. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. The standard anti-lock braking system (ABS) and electronic stability control further enhance safety. The QX80’s chassis is tuned to prioritize ride comfort and isolation from road imperfections, making it a comfortable cruiser for long journeys.
Market Reception & Comparison
The 2024 Infiniti QX80 has been generally well-received by critics, who praise its luxurious interior, comfortable ride, and powerful engine. However, its fuel economy is a common point of criticism, as expected for a vehicle of its size and weight. Compared to its competitors, the QX80 offers a distinctive styling and a focus on Japanese engineering. The Cadillac Escalade and Lincoln Navigator offer more advanced technology features, while the Lexus LX provides a more rugged and off-road-focused experience. The QX80’s reliability is generally considered to be good, although long-term data for the Z63 generation is still emerging.
Legacy
The VR35DDTT engine, while relatively new to the QX80 lineup, has proven to be a reliable and durable powerplant in other Infiniti and Nissan applications. The ZF nine-speed automatic transmission is also known for its robustness and smooth operation. As the QX80 Z63 matures, its long-term reliability will become clearer. However, based on the reputation of its core components, it is expected to be a dependable luxury SUV for years to come. In the used car market, the 2024 QX80 is expected to hold its value well, appealing to buyers seeking a spacious, luxurious, and capable full-size SUV.
