Lexus IS220d vs IS250: Which Saloon Suits You?

When considering a used luxury saloon that blends comfort, style, and a touch of Japanese reliability, the Lexus IS range often comes to mind. Within the second-generation IS models, two particular variants frequently spark debate among prospective buyers: the diesel-powered IS220d and the petrol-driven IS250. Both offer distinct driving experiences and ownership propositions, making the choice far from straightforward. This guide aims to thoroughly explore the nuances of each model, helping you determine which Lexus IS is the ideal fit for your driving needs and preferences.

The Lexus IS, introduced to compete with established German rivals, quickly carved out a niche for its refined interiors, smooth ride, and reputation for dependability. However, the powertrain choice significantly alters the character of the car. Whether you prioritise fuel efficiency for long commutes, the smooth quietness of a petrol engine, or perhaps a balance of both, understanding the strengths and weaknesses of the IS220d and IS250 is paramount before making your purchase.

Engine and Performance: Diesel Torque vs. Petrol Refinement

At the heart of the decision lies the engine. The IS220d is equipped with a 2.2-litre turbocharged four-cylinder diesel engine, producing around 175 bhp (brake horsepower) and a robust 400 Nm of torque. This torque figure is particularly noticeable, offering strong pulling power from low RPMs, making it feel quite punchy in everyday driving and for overtaking manoeuvres. The diesel engine is exclusively paired with a 6-speed manual gearbox, which some drivers appreciate for its direct engagement.

In contrast, the IS250 features a 2.5-litre naturally aspirated V6 petrol engine. This unit delivers approximately 204 bhp and 252 Nm of torque. While the torque figure is lower than the diesel, the V6 engine's power delivery is notably smoother and more linear, revving freely to its redline. The IS250 was offered with both a 6-speed manual and a 6-speed automatic transmission, with the automatic being a popular choice for its effortless operation and refinement. The V6 engine is renowned for its quiet operation and lack of vibration, contributing significantly to the car's luxury feel.

When it comes to acceleration, both models are reasonably swift. The IS220d typically manages 0-60 mph in around 8.9 seconds, while the IS250 (especially with the automatic gearbox) shaves a little off that, often completing the sprint in approximately 8 seconds. For those who enjoy a more engaging drive, the diesel's surge of torque can be satisfying, but the petrol's willingness to rev and the smooth power delivery often appeal to drivers who prioritise refinement and a traditional luxury car feel.

Fuel Economy and Running Costs

This is where the biggest divergence between the two models typically occurs. Diesel engines are generally more fuel-efficient, and the IS220d is no exception. Official combined cycle figures for the IS220d were often quoted around 44-46 mpg. In real-world driving, owners typically report figures in the high 30s to low 40s, especially on motorway journeys. This makes it an attractive option for high-mileage drivers.

The IS250, being a naturally aspirated V6 petrol, is inherently less fuel-efficient. Official combined figures were usually in the range of 30-32 mpg. Real-world consumption often hovers around 25-28 mpg, and can drop significantly lower in heavy urban traffic. For shorter journeys or predominantly city driving, the petrol model will undoubtedly be thirstier.

Beyond fuel, road tax (VED) is another significant consideration, especially for older models. Diesel vehicles often faced higher tax bands due to CO2 emissions, but this varies by specific year of registration. Generally, both models will fall into higher tax brackets compared to modern, smaller-engined cars. Insurance groups are broadly similar, reflecting their status as luxury saloons, but always obtain a quote based on your specific circumstances.

Servicing costs for both are comparable, as they are both Lexus vehicles, known for their premium parts and labour rates. However, potential specific issues can influence long-term costs. For the IS220d, preventative maintenance on the Diesel Particulate Filter (DPF) and Exhaust Gas Recirculation (EGR) valve is crucial, as these components can be expensive to replace if neglected. The IS250, with its simpler petrol engine, tends to have fewer common high-cost component failures, often leading to more predictable maintenance bills.

Reliability and Common Complaints

Lexus has an enviable reputation for reliability, and both the IS220d and IS250 generally uphold this. However, it's essential to address the 'elephant in the room' when discussing the IS220d: its specific common complaints. The 2.2-litre diesel engine, while capable, has been known to suffer from issues related to the DPF and EGR valve, particularly if the car is used predominantly for short journeys where the DPF cannot complete its regeneration cycles. In severe cases, this can lead to blocked filters and, more seriously, potential issues with the cylinder head gasket or carbon build-up. This reputation has made some buyers wary, and it's a valid concern that requires careful consideration and a thorough pre-purchase inspection.

The IS250, on the other hand, is largely regarded as one of the most reliable engines Lexus has produced. Its naturally aspirated V6 is robust and generally trouble-free. Common issues are rare, often limited to minor electrical quirks or wear-and-tear items typical of any car of its age. This strong reliability record contributes to the IS250 often being seen as the 'safer' bet in terms of long-term ownership costs and peace of mind.

Driving Experience and Comfort

Both models offer a refined and comfortable driving experience, characteristic of the Lexus brand. The suspension setup is tuned for comfort, soaking up road imperfections well, though they maintain good body control. The steering is light and precise, making them easy to manoeuvre in urban environments and stable at motorway speeds.

The key difference in driving experience comes from the engine characteristics. The IS220d, with its manual gearbox and strong low-end torque, feels more immediate and punchy. However, the diesel engine can be more vocal, especially when cold or under hard acceleration, and some drivers might notice more vibration through the cabin compared to the petrol variant. The manual gearbox, while engaging, might not suit everyone, especially in stop-start traffic.

The IS250, particularly with the automatic transmission, offers a remarkably smooth and quiet ride. The V6 engine is barely audible at cruising speeds, contributing to a serene cabin environment. The linear power delivery means less dramatic acceleration but a more composed and effortless drive. For those who prioritise quietness and a relaxed driving style, the IS250 often comes out on top.

Interior and Features

The interiors of both the IS220d and IS250 are largely identical, offering a high-quality, well-built cabin with premium materials. Standard features across the range were generous, typically including dual-zone climate control, electric windows, a premium audio system, and a comprehensive suite of safety features. Higher trim levels, such as SE-L, often added leather upholstery, heated and ventilated seats, satellite navigation, and parking sensors.

Ergonomics are excellent, with controls logically laid out. The front seats are comfortable and supportive, suitable for long journeys. Rear passenger space is adequate for two adults, though taller individuals might find legroom a little tight on longer trips. The boot space is respectable for the class, offering enough room for typical family luggage or a weekly shop.

Resale Value and Market Considerations

Due to the aforementioned reliability concerns with the IS220d, its resale value can sometimes be lower than that of a comparable IS250. The petrol model's reputation for robustness and smoother driving experience often makes it more desirable on the used market, meaning it might command a slightly higher price. However, this also means you might find a bargain IS220d if you're prepared to address potential issues or are confident in its service history.

When buying either, a full service history is paramount. For the IS220d, look for evidence of DPF regeneration cycles, regular oil changes (using the correct low-ash oil), and any preventative maintenance on the EGR valve. For the IS250, standard checks for wear and tear are usually sufficient.

Comparison Table

Frequently Asked Questions

Is the Lexus IS220d really unreliable?

While the Lexus IS220d has a reputation for specific issues, particularly with its Diesel Particulate Filter (DPF) and Exhaust Gas Recirculation (EGR) valve, it's not universally unreliable. These issues often arise from unsuitable driving patterns (e.g., frequent short journeys preventing DPF regeneration) or neglected maintenance. A well-maintained IS220d used for longer runs can be a perfectly reliable vehicle. However, the potential for these costly repairs means it requires more diligent research and a thorough pre-purchase inspection than the IS250.

What's the typical fuel economy for each model?

In real-world driving, the IS220d typically achieves between 38 and 42 miles per gallon (mpg), especially on longer journeys. The IS250, being a petrol V6, usually returns around 25 to 28 mpg in mixed driving conditions. Urban driving will see these figures drop further for both, but more significantly for the IS250.

Are parts expensive for Lexus IS models?

As a premium brand, genuine Lexus parts can be more expensive than those for mainstream manufacturers. However, many independent garages are now familiar with Lexus vehicles, and aftermarket parts are available, which can help reduce costs. Regular servicing at recommended intervals is key to preventing major component failures, which are always the most expensive.

What should I look for when buying a used Lexus IS220d or IS250?

• Full Service History: Absolutely critical for both, especially for the IS220d to verify proper oil changes (low-ash oil) and DPF maintenance.
• DPF/EGR (IS220d): Check for any warning lights or error codes. Ask about the car's typical usage.
• Engine Noise: Listen for any unusual noises from either engine. The IS250 should be very smooth and quiet.
• Gearbox: Test the manual gearbox for smooth shifts (IS220d & IS250). For the automatic IS250, ensure shifts are seamless without jerking.
• Electrics: Test all electrical components, including infotainment, climate control, and window mechanisms.
• Tyres and Brakes: Standard checks for wear and tear.
• Rust: Check common areas like wheel arches and underbody, though Lexus models are generally well-protected.

How does road tax compare between the two?

Road tax (Vehicle Excise Duty or VED) depends on the car's CO2 emissions and the year it was registered. Generally, both the IS220d and IS250 will fall into higher VED bands compared to modern, more eco-friendly vehicles. It's advisable to check the specific CO2 emissions for the exact year and model you're considering on the UK government's VED checker website for the most accurate figure.

Is there an automatic Lexus IS220d?

No, the Lexus IS220d was exclusively offered with a 6-speed manual gearbox. If you require an automatic transmission, the IS250 (which was available with a 6-speed auto) would be your only option within this generation of the IS range.

Conclusion: Making Your Choice

The decision between a Lexus IS220d and an IS250 ultimately boils down to your priorities. If you cover high mileages, predominantly on motorways, and are prepared to be diligent with maintenance and ensure the car's DPF system is well-cared for, the IS220d's superior fuel economy and strong low-end torque might appeal. It offers a more engaging, albeit sometimes louder, driving experience.

However, for most buyers, the Lexus IS250 represents the more appealing and less problematic choice. Its naturally aspirated V6 petrol engine offers unparalleled refinement, a smooth and quiet ride, and a truly bulletproof reliability record. While it's thirstier at the pumps, the peace of mind and more predictable maintenance costs often outweigh the fuel savings of the diesel, especially if your driving involves a mix of urban and motorway journeys. The availability of an automatic gearbox also makes it a more relaxing proposition for many drivers.

Before committing, we strongly recommend test driving both models to experience their distinct characteristics firsthand. Consider your typical driving habits, your budget for running costs, and your tolerance for potential maintenance. Whichever you choose, a well-maintained Lexus IS will provide a comfortable, luxurious, and generally reliable ownership experience.

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