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Is IS350 faster than is250?

Yes. Across most generations where both were offered, the IS350 is faster than the IS250, thanks to a larger engine and higher horsepower. Real-world speed depends on year, drivetrain, and transmission, but the general pattern holds: the IS350 accelerates more quickly than the IS250.

Performance comparison by engine

Core differences in power

This section highlights the fundamental powertrain differences that drive speed differences between the two variants. The IS250 uses a smaller displacement V6, while the IS350 uses a larger V6, delivering more horsepower and torque. Transmission options and drivetrain configurations also play a role in how quickly each car launches and accelerates.

Powerplant: IS250 typically uses a 2.5-liter V6 with roughly 200 horsepower, while IS350 uses a 3.5-liter V6 with well over 300 horsepower, depending on the model year. This power gap is the primary reason the IS350 feels faster.

Transmission and drivetrain: Both variants have featured rear-wheel drive with available all-wheel drive in many markets. The IS350’s higher power output generally translates to faster launches and quicker 0-60 mph times, especially with the automatic transmission.

Weight vs power: The IS350 is heavier due to its bigger engine, but the extra power more than compensates, producing quicker acceleration overall.

Real-world numbers: In common US-market configurations from the mid-2000s to early 2010s, IS250 tends to run roughly in the high 7- to low-8-second 0-60 mph range, while IS350 often lands in the mid-5- to low-6-second range—though the exact times vary by year, drivetrain, and trim.

In practice, the IS350’s extra horsepower and torque typically deliver noticeably faster straight-line performance, even when factors like tires and gearing come into play.

Other factors that influence speed

Beyond engine size, several factors affect how fast each model can accelerate and how it feels on the road. These elements can narrow or widen the perceived gap between IS250 and IS350.

Drivetrain configuration (RWD vs AWD) can change launch grip and 0-60 timing, affecting perceived speed.

Transmission type and gearing influence how quickly power is delivered and how fast the car can accelerate in each gear.

Vehicle weight and trim level (sport, luxury, or performance-oriented variants) impact acceleration and handling.

Maintenance status, fresh tune-ups, and component wear can affect engine response and throttle feel.

Note: In some markets and model years, Lexus reorganized the lineup, sometimes using different designations (for example, IS 300/IS 350 in certain markets). The core principle remains: bigger, higher-power engines generally translate to faster performance.

Summary

Across its history, the Lexus IS350 has been the faster model compared to the IS250 due to its larger engine and higher output. While exact numbers vary by year, market, and drivetrain, the speed gap is a consistent pattern: the IS350 accelerates more quickly and delivers stronger straight-line performance. For buyers prioritizing outright speed, the IS350 is typically the better choice within the IS lineup. If fuel economy or cost is a priority, the IS250 represents the slower-but-smaller-engine option. In later generations, note that Lexus’ naming and offerings can differ by market, with some regions using updated designations, but the underlying relationship—more power equals quicker acceleration—remains accurate.

Is the Lexus IS 250 a fast car?

No, the IS250 is not considered fast, but it is a responsive and capable car for daily driving. It has a 0-60 mph time of around 7.6 to 8.4 seconds, making it slower than many other luxury or performance-oriented cars on the market. The engine can feel weak under stress, like going uphill, due to a lack of low-end torque.

You can watch this video to see a test drive and performance metrics of the Lexus IS250: 59sDM Car ReviewsYouTube · Mar 15, 2024
Performance comparison

0-60 mph: Approximately 7.6 to 8.4 seconds.
Engine: A 2.5-liter V6 engine with around 204 horsepower.
Torque: Lacks significant torque, which can make it feel sluggish during acceleration or when climbing hills.
Comparison to IS350: The more powerful {is350: IS350} model is significantly faster and is a more competitive option for those seeking higher performance.

What the IS250 is good for

Daily driving: It is a reliable and comfortable car for everyday use.
Handling: It has rear-wheel drive and good handling, making it enjoyable on winding roads.
Aesthetics and build: It is a well-built, luxurious car with sharp styling.

Who it's for

The IS250 is ideal for drivers who prioritize reliability and luxury over outright speed.
If you want faster acceleration, consider the {is350: IS350} model or look at newer generations.

What is the difference between a Lexus 250 and a Lexus 350?

The main differences between a Lexus 250 and a 350 are performance and features. The 350 model typically offers a more powerful engine, a more luxurious feel with higher-end interior options, and in some cases, standard all-wheel drive (AWD). The 250 is generally more fuel-efficient, has a lower starting price, and is designed more for balanced daily driving comfort rather than high-speed performance. The best choice depends on priorities like performance vs. efficiency, budget, and desired features.

This video compares the IS 250 and IS 350 models from 2006-2014: 55sRide with MieeYouTube · Jun 12, 2022
Lexus 250

Engine and performance: Features a less powerful engine, such as a 2.5L2.5 cap L2.5𝐿 4-cylinder (203 hp) in the NX, which is sufficient for daily driving but less capable than the 350.
Features: Comes with standard luxury features like NuLuxe interior trim, dual-zone climate control, and 8-way power-adjustable driver's seats.
Fuel efficiency: Generally has better fuel economy.
Drivetrain: Often comes standard with front-wheel drive (FWD), with AWD available as an option.
Price: Has a lower starting price.

Lexus 350

Engine and performance: Features a more powerful engine, such as a turbocharged 2.4L2.4 cap L2.4𝐿 4-cylinder (275 hp) in the NX, providing faster acceleration.
Features: Offers more premium options for customization, like perforated leather seats, higher-end trim materials, and features like a Head-Up Display.
Fuel efficiency: Slightly less fuel-efficient due to the more powerful engine.
Drivetrain: Often comes standard with all-wheel drive (AWD).
Price: Has a higher starting price.

You can watch this video to learn about the differences between the NX 250 and 350 models: 58sHawkeye RidesYouTube · May 28, 2025
Which one should you choose?

Choose the 250 if: You prioritize fuel efficiency and a lower purchase price. It's a great choice for daily driving and comfortable commutes where high-speed performance isn't a priority.
Choose the 350 if: You want a more powerful and dynamic driving experience and are willing to pay more for it. The extra features and standard AWD (in some models) are appealing.

Is the Lexus IS 350 Sport fast?

The Lexus IS 350 F Sport can go 0 to 60 in just 5.6 seconds for the RWD model, and slightly slower for the AWD option. Both versions can reach 143 MPH before being electronically limited. That makes the vehicle fast enough for sports sedan enthusiasts, while still being enjoyable for daily driving.

What is better, Lexus IS 250 or IS350?

The main difference is performance: the IS 350 is more powerful with its larger engine (3.5L3.5 cap L3.5𝐿 vs. 2.5L2.5 cap L2.5𝐿), while the IS 250 offers better fuel economy and could be found with a manual transmission, though it has a known carbon buildup issue. The IS 350 has more horsepower (306306306 hp vs. 204204204 hp), but the IS 250 is lighter and has a better-balanced feel, making it a potential choice for some enthusiasts. The IS 350 is considered more reliable by some due to its dual port and direct injection system, which helps prevent carbon buildup on the valves, a problem that can affect the IS 250.
This video discusses the main differences between the Lexus IS 250 and IS 350: 1mRide with MieeYouTube · Jun 12, 2022

Feature	IS 250	IS 350
Engine	2.5L2.5 cap L2.5𝐿 V6	3.5L3.5 cap L3.5𝐿 V6
Horsepower	204204204 hp	306306306 hp
Fuel Economy	Slightly better average MPG	Slightly worse average MPG
Transmission	Available with manual transmission on some models	Automatic only on some models
Reliability	Potential for carbon buildup on intake valves due to direct injection	Dual port and direct injection helps prevent carbon buildup
Performance	Slower acceleration (approx. 777 sec 0−600 minus 600−60 mph)	Faster acceleration (approx. 555 sec 0−600 minus 600−60 mph)
Weight	Lighter, potentially better-balanced feel	Heavier due to larger engine
Price (used)	Lower price range	Higher price range

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.