Loading

What is the difference between Lexus RX 350h and 450h?

The Lexus RX is a popular luxury SUV that comes in two hybrid variants: the RX 350h and the RX 450h. While both models offer enhanced fuel efficiency and reduced emissions compared to their non-hybrid counterparts, there are some key differences between the two that buyers should consider.


Engine and Powertrain


The Lexus RX 350h is powered by a 2.5-liter four-cylinder engine paired with an electric motor, producing a combined output of 308 horsepower. The RX 450h, on the other hand, features a larger 3.5-liter V6 engine combined with two electric motors, resulting in a total system output of 308 horsepower as well.p>

Fuel Economy and Emissions


The Lexus RX 350h boasts an impressive EPA-estimated fuel economy of 33 mpg in the city and 30 mpg on the highway, with a combined rating of 32 mpg. The RX 450h, with its more powerful V6 engine, achieves slightly lower fuel economy numbers of 31 mpg city, 28 mpg highway, and 30 mpg combined.


In terms of emissions, both models are considered low-emission vehicles, with the RX 350h being classified as a Super Ultra-Low Emission Vehicle (SULEV) and the RX 450h as an Ultra-Low Emission Vehicle (ULEV).


Driving Dynamics


The Lexus RX 350h and RX 450h offer similar driving experiences, with both models providing a smooth and comfortable ride. However, the RX 450h may offer a slightly more responsive and engaging driving feel due to its more powerful V6 engine.p>

Pricing and Availability


The Lexus RX 350h and RX 450h are both available at Lexus dealerships, with the RX 350h typically being the more affordable option. The exact pricing may vary depending on location, trim level, and any available incentives or promotions.


In summary, the Lexus RX 350h and RX 450h are both excellent hybrid SUV options, offering enhanced fuel efficiency and reduced emissions. The key differences lie in the engine and powertrain, with the RX 450h featuring a more powerful V6 engine and slightly lower fuel economy, but potentially a more engaging driving experience.

How many miles per gallon does the Lexus RX 450h+ get?


35 mpg combined
The EPA rates the 2024 Lexus RX 450H+ at 35 mpg combined when running on hybrid power and 83 MPGe when including electric driving. One of the reasons for this excellent fuel efficiency is the all-electric driving range of 37 miles, during which the 450H+ doesn't need to use any gasoline.



Is the Lexus 350h a plug-in hybrid?


The RX 350h is a conventional β€” rather than a plug-in β€” hybrid. Unlike the V6-based RX 450h from last year, the 2023 RX 350h employs a four-cylinder engine, improving fuel economy while retaining the off-the-line responsiveness supplied by the electric assist motors.



How long does a Lexus RX 450h hybrid battery last?


2021 Lexus RX 450h batteries frequently last between 3-5 years, but this is variable depending on the type of battery, weather conditions, driving habits, and more. You can prolong the life of your RX 450h battery by: Keeping your vehicle stored indoors away from extreme swings in temperature or climate.



Does Lexus RX 450h hybrid require premium gas?


You can put premium gas in your Lexus RX, and it can provide better performance, but it's not a requirement. Any gas that's put in your Lexus RX shouldn't be higher than 15% ethanol. If gasoline at the pump has more than 15% ethanol, or it's labeled as a flex-fuel, it shouldn't be used in your RX.



What does the RX 350h stand for?


The 2025 Lexus RX 350 is outfitted with a turbo 2.4-liter, four-cylinder engine. This system comes with an eight-speed auto transmission and produces 275 horsepower. The RX 350h combines a 2.5-liter, four-cylinder engine with a hybrid component for enhanced fuel economy.



Which year Lexus RX 450h is the best?


The Best Model Years to Buy a Lexus RX 450h
The 2022 Lexus RX 450h is our top pick for the best model year value for the RX 450h. With the 2022, you would only pay, on average, 71% of the price as new, with 83% of the vehicle's useful life remaining.



What is the difference between Lexus RX 350h and RX 450h?


A major difference between the two is seen in the engine and performance with the RX 350h equipped with a 246hp 2.5L 4-cylinder engine with Lexus Hybrid Electric Drive and the RX 450h+ having a 304hp 2.5L 4-cylinder engine with Lexus Plug-in Hybrid Electric Drive.



Does Lexus 350h require premium gas?


According to Lexus, the RX 350h requires premium unleaded gasoline with an octane rating of 91 or higher. This recommendation is consistent across all model years of the RX 350h. Using a lower octane fuel can potentially lead to engine knocking, reduced performance, and decreased fuel efficiency.



What is the difference in Lexus hybrid and plug-in hybrid?


The main difference between hybrid and plug-in hybrid vehicles is that plug-in hybrid vehicles can be driven using nothing but electric powerβ€”at least for short distances. With a plug-in hybrid, you may be able to charge up overnight and knock out your commute without any gas at all.



What is the mileage on a Lexus RX 350h?


37 mpg city/34 mpg highway
2023 Lexus RX 350h AWD: 37 mpg city/34 mpg highway.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.