The Infiniti QX55 2.0i Turbo, introduced for the 2021 model year, represents Infiniti’s attempt to recapture the coupe-like crossover market. Positioned as a more stylish alternative to the traditional QX50, the QX55 blends the practicality of an SUV with a sloping roofline inspired by the earlier FX series. This variant, powered by a 2.0-liter turbocharged four-cylinder engine paired with a continuously variable transmission (CVT) and Infiniti’s Intelligent All-Wheel Drive (IAWD) system, served as the primary offering for the QX55 lineup in the North American market. It aimed to appeal to buyers seeking a premium crossover with a focus on design and a relatively efficient powertrain.
Technical Specifications
| Brand | Infiniti |
| Model | QX55 |
| Generation | QX55 |
| Type (Engine) | 2.0i Turbo (268 Hp) IAWD CVT |
| Start of production | 2021 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Emission standard | LEV3-ULEV70 |
| Weight-to-power ratio | 6.8 kg/Hp, 147.2 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 208.7 Nm/tonne |
| Power | 268 Hp @ 5600 rpm |
| Power per litre | 134.2 Hp/l |
| Torque | 380 Nm @ 4400-4800 rpm, 280.27 lb.-ft. @ 4400-4800 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | KR20DDET |
| Engine displacement | 1997 cm3, 121.86 cu. in. |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm, 3.31 in. |
| Piston Stroke | 90.1 mm, 3.55 in. |
| Compression ratio | 8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.7 l, 4.97 US qt | 4.14 UK qt |
| Coolant | 7.7 l, 8.14 US qt | 6.78 UK qt |
| Kerb Weight | 1821-1844 kg, 4014.62 – 4065.32 lbs. |
| Max. weight | 2302 kg, 5075.04 lbs. |
| Max load | 458-481 kg, 1009.72 – 1060.42 lbs. |
| Trunk (boot) space – minimum | 762 l, 26.91 cu. ft. |
| Trunk (boot) space – maximum | 1532 l, 54.1 cu. ft. |
| Fuel tank capacity | 61 l, 16.11 US gal | 13.42 UK gal |
| Length | 4732 mm, 186.3 in. |
| Width | 1902 mm, 74.88 in. |
| Height | 1621 mm, 63.82 in. |
| Wheelbase | 2799 mm, 110.2 in. |
| Front track | 1636 mm, 64.41 in. |
| Rear (Back) track | 1621 mm, 63.82 in. |
| Ride height (ground clearance) | 218 mm, 8.58 in. |
| Minimum turning circle (turning diameter) | 11.1 m, 36.42 ft. |
| Approach angle | 17.4° |
| Departure angle | 23.6° |
| Ramp-over (brakeover) angle | 19.1° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels permanently, and the rear 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 | automatic transmission CVT |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 330×33 mm |
| Rear brakes | Ventilated discs, 307×15 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/45 R20 |
| Wheel rims size | 20 |
INTRODUCTION
The Infiniti QX55 2.0i Turbo, launched in 2021, is a five-door crossover SUV that aimed to blend style and practicality. Built on a modified version of the QX50’s platform, the QX55 distinguished itself with a dramatically sloping roofline and a more aggressively sculpted exterior. This variant, equipped with the 2.0-liter VC-Turbo engine and CVT, represented the core of the QX55 range in the US market. It was positioned as a competitor to vehicles like the Acura RDX, BMW X4, and Mercedes-Benz GLC Coupe, targeting buyers who prioritized design and a comfortable driving experience over outright performance.
Powertrain & Engine Architecture
At the heart of the QX55 2.0i Turbo lies the KR20DDET, a 2.0-liter inline-four cylinder engine featuring Infiniti’s Variable Compression-Ratio (VC-Turbo) technology. This innovative system allows the engine to seamlessly adjust its compression ratio between 8:1 and 14:1, optimizing for both power and efficiency. The engine utilizes direct injection and multi-port fuel injection to enhance combustion and reduce emissions. A single twin-scroll turbocharger with an intercooler provides forced induction, boosting output to 268 horsepower at 5600 rpm and 280 lb-ft of torque between 4400-4800 rpm. The engine is paired with a Jatco-sourced continuously variable transmission (CVT) that simulates stepped gear changes for a more engaging driving experience. The IAWD system intelligently distributes torque between the front and rear axles, enhancing traction and stability in various driving conditions.
Driving Characteristics
The QX55 2.0i Turbo delivers a smooth and refined driving experience. The CVT, while not offering the immediate response of a traditional automatic, provides seamless acceleration and contributes to good fuel economy. The VC-Turbo engine provides adequate power for everyday driving, with the turbocharger providing a noticeable boost in acceleration when needed. Compared to a hypothetical higher-output engine variant, this 268 hp setup prioritizes fuel efficiency and a more relaxed driving style. The IAWD system provides confident handling in inclement weather, but the QX55 is not designed for aggressive off-road driving. The steering is light and precise, making it easy to maneuver in urban environments. The CVT’s programmed “steps” attempt to mimic traditional gear changes, but can sometimes feel disconnected from the engine’s output.
Equipment & Trim Levels
The QX55 2.0i Turbo came standard with a generous array of features, including leather upholstery, heated front seats, a dual-screen infotainment system with Apple CarPlay and Android Auto compatibility, a Bose premium audio system, and a suite of advanced driver-assistance systems (ADAS) such as lane departure warning, blind-spot monitoring, and automatic emergency braking. Available options included a panoramic sunroof, ventilated front seats, and a motion-activated liftgate. Trim levels were relatively streamlined, with most QX55s being well-equipped from the base configuration. Interior materials were generally high-quality, with a focus on creating a luxurious and comfortable cabin environment.
Chassis & Braking
The QX55 utilizes an independent McPherson strut front suspension and an independent multi-link rear suspension, tuned for a balance of comfort and handling. 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. The front brakes measure 330x33mm, while the rear brakes are 307x15mm. Anti-lock braking system (ABS) and electronic brake-force distribution (EBD) are standard features. The QX55’s suspension is tuned towards comfort, resulting in a relatively soft ride quality.
Market Reception & Comparison
The Infiniti QX55 received mixed reviews from automotive critics. While praised for its stylish design and comfortable interior, some reviewers criticized its CVT transmission and the lack of a more powerful engine option. Compared to the QX50, the QX55 offered a more visually appealing design but sacrificed some of the QX50’s cargo space due to the sloping roofline. Fuel economy was generally considered competitive for its class, with the VC-Turbo engine delivering respectable MPG figures. Reliability reports have been relatively positive, although long-term data is still emerging. The QX55 aimed to compete with established players in the luxury crossover segment, but its relatively limited brand recognition and the availability of more performance-oriented alternatives presented challenges.
Legacy
The Infiniti QX55 represents a bold design statement for the brand, attempting to revitalize its image and attract a younger demographic. While its sales figures haven’t matched those of some of its competitors, the QX55 has established itself as a unique offering in the luxury crossover market. The VC-Turbo engine, while complex, showcases Infiniti’s commitment to innovative powertrain technology. As the QX55 enters the used car market, its long-term reliability and maintenance costs will become increasingly important factors for potential buyers. The QX55’s distinctive styling and comfortable driving experience are likely to ensure its continued appeal to those seeking a stylish and practical crossover SUV.
