For drivers who spend long hours on the road, whether commuting or travelling between cities, a diesel car can be the ideal choice. Diesel engines are known for fuel efficiency, torque for motorway cruising, and durability, making them perfect for long-distance driving.
This guide covers the best used diesel cars for long-distance driving, highlighting reliability, comfort, fuel economy, and running costs. It also includes a FAQ section at the end to answer common questions for UK drivers in 2026.
Why Choose a Diesel Car for Long Distance Driving?
Diesel engines are often favoured for long-distance journeys because:
- Better fuel economy – Diesel engines typically deliver more miles per gallon than petrol equivalents, especially on motorways.
- More torque – Diesel engines provide strong low-end torque, making overtaking and motorway driving easier.
- Durability – Diesel engines tend to have longer lifespans if properly maintained.
- Lower CO₂ emissions – Modern diesel engines emit less CO₂ than petrol cars over long distances, which may reduce road tax.
However, diesel cars are less suited for short city trips due to particulate filter issues if they aren’t regularly driven over long distances.
What to Look for When Buying a Used Diesel Car
When choosing a used diesel car for long-distance driving, consider the following:
- Mileage vs Age – Diesel engines often perform well with higher mileage, so don’t be put off by a car with 80,000–100,000 miles if it has been properly serviced.
- Service History – Full documented servicing is essential, especially for turbocharged engines and DPF (diesel particulate filter) maintenance.
- Fuel Efficiency – Check real-world MPG figures for the car, especially if you do lots of motorway miles.
- Comfort and Features – Long-distance driving is easier in cars with good seating, cruise control, and infotainment features.
- Emissions Compliance – Ensure the car meets current UK emission standards, particularly in low-emission zones in cities.
Top Used Diesel Cars for Long Distance Driving
1. BMW 3 Series Diesel
Smooth engines and comfortable seating make this a motorway-friendly option.
Why it’s ideal: Excellent fuel economy, comfortable ride, reliable engine
2. Volkswagen Passat Diesel
Spacious and efficient, perfect for long journeys and families.
Why it’s ideal: Large boot, fuel-efficient, motorway comfort
3. Audi A4 Diesel
Refined and comfortable with durable diesel engines.
Why it’s ideal: Smooth drive, premium interior, long-lasting engine
4. Skoda Octavia Diesel
Practical, spacious, and economical, great for carrying passengers and luggage.
Why it’s ideal: Spacious, reliable, low running costs
5. Ford Mondeo Diesel
Reliable and comfortable for high-mileage drivers.
Why it’s ideal: Comfortable, robust diesel engines, excellent for commuters
6. Mercedes-Benz C-Class Diesel
Premium comfort with smooth automatic or manual diesel options.
Why it’s ideal: Comfort, refinement, durable diesel engine
7. Peugeot 508 Diesel
Combines fuel efficiency with a quiet, comfortable cabin for long drives.
Why it’s ideal: Economical, quiet interior, smooth long drives
Tips for Buying a Used Diesel Car
- Check DPF and turbo condition – Ensure these components are in good shape.
- Test on a motorway – Make sure the car drives smoothly at higher speeds.
- Inspect service history – Diesel engines require regular oil changes and filter replacements.
- Manual or automatic – Modern diesel automatics are excellent for motorway cruising.
Expert Insight
“As someone who’s worked in the automotive industry for over 15 years, I can confidently say that diesel cars are one of the smartest choices for drivers who spend a lot of time on the motorway. When properly maintained, a diesel engine not only delivers excellent fuel economy but can easily provide many years of reliable long-distance driving.” – James Thornton, Automotive Industry Expert
Frequently Asked Questions (FAQ)
Q: Are diesel cars better for long-distance driving?
A: Yes, diesel engines are generally more fuel-efficient, have better torque for motorway driving, and are built for longevity.
Q: Is it expensive to maintain a diesel car?
A: Maintenance costs can be slightly higher than petrol cars, mainly due to components like the turbo and diesel particulate filter. However, over long distances, the fuel savings often outweigh these costs.
Q: Can I use a diesel car for city driving?
A: Diesel cars can be used in cities, but frequent short trips can cause issues with DPFs. Diesel is best suited for motorway and long-distance driving.
Q: What is the best mileage for a used diesel car?
A: High-mileage diesel cars (80,000–120,000 miles) can still be reliable if well maintained, as diesel engines are built for long-term durability.
Q: Should I buy a diesel or petrol car for commuting long distances?
A: For consistent long-distance travel, diesel cars are usually more economical and comfortable due to their fuel efficiency and torque.
Final Thoughts
A used diesel car is ideal for UK drivers covering high mileages, offering fuel efficiency, motorway comfort, and long-term durability. Models like the BMW 3 Series, Volkswagen Passat, Audi A4, Skoda Octavia, and Ford Mondeo are excellent choices for long-distance drivers looking for a reliable used vehicle in 2026.
