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Is the Lexus IS 350 bigger than the IS 300?

Not in exterior size. In most model years, the IS 350 and IS 300 share the same overall footprint, with the main differences centered on engines and performance rather than physical dimensions.


Size and exterior footprint


To understand whether one model is larger, it helps to separate exterior dimensions from performance. The two trims largely ride on the same chassis and occupy the same space on the road.



  • Exterior length: generally the same across IS 300 and IS 350

  • Exterior width: typically identical or nearly so

  • Exterior height: comparable between the two trims

  • Wheelbase: the same, contributing to similar ride quality and interior space

  • Interior passenger space and cargo area: effectively similar in most years


In short, the IS 300 and IS 350 do not aim to be "bigger" in size; they are designed to offer similar dimensions with different powertrains.


Power, weight, and overall feel


Where the models differ is under the hood and in how that power translates to acceleration and driving dynamics. The IS 350 is equipped with a larger engine, while the IS 300 uses a smaller, turbocharged unit in many markets. These differences influence performance and weight, but not the car’s exterior size.



  • IS 350: typically a larger displacement V6 engine delivering more horsepower and torque

  • IS 300: commonly uses a turbocharged or smaller-displacement engine with lower peak output

  • Weight differences: the IS 350 may weigh more due to the bigger engine and related equipment, but this does not affect exterior dimensions


Conclusion: Engine and performance specifications differ between the two, but their exterior footprint remains essentially identical.


Bottom line


For practical purposes, the Lexus IS 350 is not bigger than the IS 300 in terms of length, width, height, or cargo space. The distinction lies in engine choice, power, and driving dynamics rather than overall size.


Summary


The Lexus IS 350 and IS 300 share the same exterior dimensions and interior space across most model years. The key difference is the powertrain: the IS 350 uses a larger V6 while the IS 300 uses a smaller, turbocharged engine in many markets. If you’re comparing them by size alone, they are effectively the same size; if you’re comparing performance, the IS 350 offers stronger acceleration and more torque on tap.

What is the difference between Lexus IS 300 and IS 350?


The main difference is performance: the IS 350 has a more powerful 3.5L V6 engine (311 hp) while the IS 300 uses either a 2.0L turbo-four (241 hp) or a 3.5L V6 (260 hp), depending on the drivetrain. Other differences include a more aggressive F Sport appearance on some IS 350 models, potentially larger wheels, and a higher starting price for the IS 350. However, both models share many standard features and reliability levels.
 
This video compares the exterior features of the 2021 Lexus IS 300 and IS 350 F-Sport: 1mIBKadeYouTube · Feb 28, 2021
Performance and engine

  • IS 300:
    • RWD: Comes with a 2.0L turbocharged 4-cylinder engine producing 241 hp. 
    • AWD: Comes with a 3.5L V6 engine producing 260 hp. 
  • IS 350: Comes exclusively with a more powerful 3.5L V6 engine that produces 311 hp, regardless of drivetrain. 

Exterior and styling
  • IS 300:
    • More basic rear bumper with dual exhaust tips. 
    • May have smaller wheels and less aggressive body styling. 
  • IS 350:
    • Often features F Sport styling, including a unique front grille. 
    • May have a more stylish rear bumper, black gloss side skirts, or a rear spoiler. 
    • Can come with larger wheels (e.g., 19-inch wheels). 

Features and options
  • Interior: The IS 350 may have a more premium gauge cluster with a larger central display compared to the IS 300's smaller screen. 
  • Drivetrain: Both models offer Rear-Wheel Drive (RWD) and All-Wheel Drive (AWD), though the IS 350's V6 is more powerful in both configurations. 
  • Price: The IS 350 has a higher starting price than the IS 300. 

Which one should you choose?
  • Choose the IS 300 if you prioritize fuel economy and are looking for a more budget-friendly option, especially the turbo-four RWD model. 
  • Choose the IS 350 if you want the extra power and performance, or if you prefer the sportier F Sport styling that may be available on this trim. 



What is the difference between Lexus IS 300, 350, and 500?


Depending on your drivetrain, the IS 300 has either 241 horsepower (RWD) or 260 horsepower (AWD). The IS 350 ups the ante to 311 horsepower, surpassing either configuration of the 300 at the cost of a slight reduction in fuel economy. For maximum potency, you can climb even further: the IS 500 reaches 472 horsepower.



Is the Lexus IS 300 being discontinued?


Yes, Lexus will discontinue the current generation of the IS 300, along with the IS 350, IS 500, and the RC lineup, with production ending in November 2025. A new, redesigned IS is expected to arrive for the 2026 model year, and while it will have a different powertrain and design, the "IS 300" designation may continue in the future.
 

  • Production end date: Lexus will end production of the current IS 300, IS 350, and IS 500 in November 2025. 
  • Replacement model: The company plans to release a redesigned IS for the 2026 model year, which will feature updated styling and likely a new hybrid powertrain. 
  • Current availability: Sales will conclude once the November 2025 production allocation is filled. 
  • Discontinued models: The IS 300, IS 350, IS 300h, IS 500, and the entire RC coupe lineup will be discontinued at this time. 
  • Future of IS 300: While the current IS 300 is being discontinued, the name may return for the new generation, though likely with different mechanical components, as seen in reports mentioning a new hybrid powertrain for the 2026 IS, say Yahoo! Autos. 



What is the Toyota equivalent of the Lexus IS 350?


The Toyota Camry, particularly the TRD or XSE V6 trims, is the closest Toyota equivalent to the Lexus IS 350, as both are sporty sedans from the same parent company. The Lexus IS 350 is the luxury-oriented version, while the Camry offers a more practical and often more affordable alternative, with higher trims like the TRD and XSE sharing similar V6 engine options. 
You can watch this video to compare the design of the Toyota Camry XSE and the Lexus IS350 F Sport: 1mBros FOURR SpeedYouTube · Sep 26, 2024
Comparison points

  • Performance: Both the Lexus IS 350 and higher-trim Toyota Camry models offer a powerful V6 engine, but the Lexus generally has a sportier feel and suspension tuning. The 2025 Lexus IS 350 has a 2.5L 4-cylinder hybrid engine, while the Camry has a hybrid engine option as well. 
  • Interior and features: The Lexus IS 350 provides a more luxurious interior with higher-quality materials and more advanced technology features as standard. The Camry offers more rear headroom and storage space. 
  • Price: The Camry is typically more affordable than the IS 350. 
  • Target audience: The IS 350 is better suited for buyers who prioritize luxury and sporty driving, while the Camry is a more practical choice for everyday driving. 

This video compares the design differences between the Lexus ES and the Toyota Camry: 1mPerformance LexusYouTube · Dec 18, 2024


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Kevin Bennett

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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.