What Does The Lexus RX 350’s “RX” Actually Mean?

For nearly four decades, Lexus has been a global fixture, yet many enthusiasts still don’t know the meanings behind its two-letter model designations. The brand’s best-selling midsize SUV, the Lexus RX, is currently preparing for a major refresh in 2028.

The model was originally introduced in 1998, with subsequent generational updates occurring in 2004, 2010, 2016, and 2023. According to Lexus, the RX designation officially stands for “Radiant Crossover.” At the turn of the millennium, the company selected “radiant” to symbolize a “bright new future,” a nomenclature that has persisted to the present day. The “X” denotes “Crossover,” signifying the vehicle’s market positioning as a bridge between traditional luxury sedans and full-capability off-roaders.

Lexus Model Numbers No Longer Reflect Displacement

Lexus model numbers no longer indicate engine displacement. For example, the original RX 300 had a 3.0-liter V6, while the current RX 350 uses a turbocharged 2.5-liter four-cylinder engine. The lineup also includes the hybrid RX 350h and plug-in hybrid RX 450h+, both featuring electrified 2.5-liter powertrains.

Regarding the flagship RX 500h F Sport Performance, the nomenclature might imply the presence of Lexus’ discontinued 5.0-liter V8; however, the vehicle is actually powered by a hybrid turbocharged 2.4-liter unit, yielding a combined output of 366 horsepower. Recent intelligence suggests that Lexus is developing a GR version of the RX, which may carry the “Morizo RR” badge with the endorsement of Gazoo Racing. In addition to featuring a lowered and widened stance, this forthcoming performance SUV is rumored to generate up to 600 horsepower through a hybrid configuration consisting of a new 2.0-liter engine paired with dual electric motors.

As For The Rest Of The Models…

The “Radiant Crossover” moniker serves as part of a consistent naming hierarchy across the entire Lexus portfolio, with each designation holding a specific meaning. The entry-level LBX, currently unavailable in the U.S. market, stands for “Lexus Breakthrough Crossover”. Within the SUV lineup, the UX denotes “Urban Crossover”, the NX represents “Nimble Crossover”, and the TX signifies “Touring Crossover.” Furthermore, the fully electric RZ mirrors the RX nomenclature, standing for “Radiant Zero” to highlight its zero-emission capabilities.

GX stands for Grand Crossover, and LX for Luxury Crossover. Lexus uses consistent naming for its sedans: IS (Intelligent Sport), ES (Executive Sedan), and LS (Luxury Sedan). The lineup also includes the LC (Luxury Coupe) and LM (Luxury Mover). F and F Sport variants refer to Japan’s Fuji Speedway, where Lexus master drivers calibrate vehicle performance.

• See More: Lexus Upgrades The LX For The 2027 Model Year In Japan