2021 Acura RDX vs 2021 Lexus NX

The 2021 Acura RDX housed a robust turbocharged 2.0-liter four-cylinder engine generating 272 horsepower at 6,500 rpm and 280 lb-ft of torque between 1,600 and 4,500 rpm. This powerplant paired with a 10-speed automatic transmission with paddle shifters, and the default front-wheel drive could be upgraded to the advanced torque-vectoring SH-AWD system. Capable of sending up to 70% of the engine's power to the rear wheels, and then directing all of that torque to one of the rear wheels, the SH-AWD significantly enhanced handling, delivering a more engaging driving experience.

Acura’s Integrated Dynamics System allowed drivers to choose between Snow, Comfort, Sport, and Sport+ modes, altering the powertrain, steering, and suspension calibrations. The A-Spec model's exclusive 20-inch alloy wheels and lower-profile 255/45 performance all-season tires provided a sportier ride, though the lack of adaptive dampers—available only with the Advance Package—meant some unnecessary body motion on less-than-perfect roads. Additionally, Acura could have improved the experience by offering features like rev-matching for the transmission in Sport+ mode and a summer performance tire option.

Meanwhile, the 2021 Lexus NX’s turbocharged 2.0-liter four-cylinder engine offered 235 horsepower and 258 lb-ft of torque. The NX’s six-speed automatic transmission, while competent, lagged behind the smoother eight, nine, and 10-speed transmissions of some competitors. The NX accelerated from zero to 60 mph in about seven seconds, a decent time for the segment, though the powertrain could get noisy under hard acceleration. The F Sport model’s Active Sound Control system attempted to enhance the engine note through the speakers, but it felt more gimmicky than genuine.

The NX’s standard front-wheel drive could be upgraded to an all-wheel-drive system that shifted up to 50% of torque to the rear axle but lacked individual-wheel torque vectoring. Fuel economy was consistent across models, with FWD versions rated at 22 mpg city, 28 mpg highway, and 25 mpg combined. AWD variants posted similar figures, except for a slightly lower 24 mpg combined rating. The NX also featured an optional adaptive suspension system, which made numerous rapid adjustments for a smoother ride but didn’t offer the same dynamic feedback as the RDX.

Despite being classified as a compact SUV, the 2021 Acura RDX offered generous passenger and cargo space, making it an excellent value. The front seats, a hallmark of Acura comfort, provided 12-way power adjustment and were both heated and ventilated in the A-Spec trim. However, maximizing rear cargo space compromised rear-seat comfort, leading to a lack of leg support and an uncomfortable seating posture due to the low and flat cushion design.

Storage space within the cabin could have been improved, with a sizable but inconveniently accessed tray below the center console. Official cargo volume measurements showed 29.5 cubic feet behind the rear seats, expanding to 58.9 cubic feet with the seats folded. A deep side storage well and multiple compartments under the cargo floor enhanced practicality. Acura also quoted a maximum cargo capacity of 79.8 cubic feet, though this figure seemed optimistic based on loading the SUV unusually.

Conversely, the 2021 Lexus NX’s interior, while stylish and comfortable, offered limited cargo space. The front seats provided ample space and comfort, with available heating and ventilation. Rear seats were spacious for adults, featuring a 60/40 split-folding design. However, the NX's sloping roofline limited cargo capacity, providing just 17.7 cubic feet behind the second row and 54.6 cubic feet with the seats down, one of the smallest capacities in its class. Despite its design constraints, the NX offered a power liftgate with a kick sensor and power-folding rear seats as optional upgrades.

Inside, the RDX A-Spec boasted front sport seats with simulated suede inserts, a sporty steering wheel, a black headliner, brushed aluminum trim, sport pedals, red stitching, ambient lighting, and unique gauges. Though most choices offered a dynamic cabin aesthetic, the red markings on the brushed silver background gauge cluster were difficult to read, except at night.

In contrast, the 2021 Lexus NX adhered to Lexus’s signature design language, characterized by sharp lines and a sculpted exterior that mirrored the brand's smaller UX and larger RX models. The dimensions of the NX were similar to the Toyota RAV4, offering a familiar, yet luxurious exterior profile. Standard features included power-folding mirrors and 17-inch wheels, with the F Sport variant dialing up the sportiness with its unique honeycomb grille, LED headlights, chrome-trimmed lower bumper, and exclusive 18-inch wheels.

The NX F Sport’s interior featured quilted NuLuxe sport seats, which could be spec'd in bold Circuit Red or more conventional Black and Arctic White/Black combinations. The material quality and fit and finish were exceptional, though the aging design of the metal-faced four-dial gauge cluster felt outdated next to the fully-digital displays seen in contemporary rivals.

Acura’s True Touchpad Interface (TTI) was a notable feature in the 2021 RDX. This system, which used a touch-sensing pad on the center console, mirrored the infotainment screen’s layout, intending to be more intuitive than the similar Lexus system. However, retraining users accustomed to laptop touchpads proved challenging, and it often required extra attention to confirm commands. The RDX included many features like Apple CarPlay, Android Auto, and Amazon Alexa integration, enhancing user convenience. The A-Spec trim’s 16-speaker Acura/ELS Studio 3D premium audio system was another highlight, delivering excellent sound quality.

Technology the 2021 Lexus NX included a centrally positioned infotainment screen, available in 8-inch or 10.3-inch sizes with the Navigation package. This package added features like predictive traffic information, fuel station guidance, and included in-car concierge services via Lexus Enform Destination Assist. Standard features included Apple CarPlay, Android Auto, dual-zone automatic climate control, and a WiFi hotspot. The NX’s interface, while packed with features, was less intuitive and more complicated than many competitors. The vehicle also supported the Lexus Enform Remote app, offering remote vehicle control and monitoring functions along with maintenance alerts through Lexus Enform Services Connect.

The 2021 Acura RDX came with the AcuraWatch suite of safety features, comprising adaptive cruise control, lane-keep assist, lane-departure warning, forward-collision warning, and automatic emergency braking. Blind-spot warning and rear cross-traffic alert were only available with the Technology Package, a drawback for base trim buyers. Nevertheless, the RDX received the top “Top Safety Pick+” rating from the IIHS and a five-star overall rating from the NHTSA, although it earned four-star ratings for frontal impacts and rollover resistance.

The Lexus NX’s 2021 model year featured Lexus Safety System+ 2.0 as standard, providing a comprehensive array of safety features, such as lane-departure warning, lane-keep assist, traffic-sign recognition, automatic high beams, forward-collision warning, and adaptive cruise control. Additional standard features included blind-spot monitoring and rear cross-traffic alert. Optional advanced safety features included park assist, a surround-view camera system, and adaptive headlights. The NX received top “Good” scores from the IIHS in all crash tests, along with a “Superior” rating for front crash prevention and an “Acceptable” score for LATCH system ease of use. The NHTSA also awarded it a five-star overall safety rating.