Mahindra Thar Mileage Comparison: Petrol vs Diesel (2026)

The Mahindra Thar is a legendary lifestyle SUV perfect for adventure lovers. It offers exceptional off-road capability and immense street presence. You can choose between powerful petrol and reliable diesel fuel options. The petrol engine gets a manual or automatic transmission. The diesel version also provides manual and automatic gearboxes. This Mahindra Thar mileage comparison matters for your overall ownership costs. Buyers wanting refined performance often prefer the petrol automatic variant. Budget-conscious drivers focus on the excellent fuel efficiency of the diesel model.

Variant-Wise Price Difference

Before we proceed with the Mahindra Thar mileage comparison, check the prices. It is important to understand the premium you pay for the diesel. Let us look at the ex-showroom price difference for the LXT 4WD variant.

There is a typical premium for the diesel engine option. You pay an extra Rs. 80,000 for the diesel 4WD variant.

Mahindra Thar ARAI Mileage Figures

Here are the lab-tested figures for the Mahindra Thar mileage.

Disclaimer: Thar ARAI mileage is not equivalent to real-world average. ARAI figures are tested under strictly laboratory-controlled environmental conditions. Real-road driving always provides slightly varying statistics.

Mahindra Thar Mileage vs Competitors

The Maruti Jimny delivers a higher 16.94 km/l petrol average. This is compared to the Mahindra Thar petrol variant. However, the Jimny lacks a diesel engine option entirely. 

The Thar offers a diesel option with an impressive 15.20 km/l claimed efficiency. However, if you require the added practicality of five doors without losing that rugged capability, the Mahindra Thar Roxx mileage comparison reveals around 15.2 km/l on diesel and 12.4 km/l on the turbo-petrol.

Mahindra Thar Real-World Fuel-Efficiency (City vs Highway)

Below is the real-world average of the Mahindra Thar. This covers both city and highway driving conditions.

In city traffic, the petrol manual typically delivers an average of 7-9 km/l. The diesel manual returns a significantly higher 10-12 km/l average. On the highway, the mileage gap continues to remain substantial. The petrol manual offers approximately 10-12 km/l. The diesel variant stretches further with an impressive 13-15 km/l. 

Real-world numbers differ from ARAI figures. Lab tests exclude heavy traffic and constant air conditioning usage. City traffic heavily impacts petrol efficiency due to constant idling. Smooth driving styles significantly improve highway fuel efficiency.

Bear in mind that maintaining the right Mahindra Thar tyre pressure is important to obtain the right mileage on every journey.

Petrol vs Diesel Comparison: Performance

Beyond the Mahindra Thar fuel efficiency, here are the performance specifications. This shows how the petrol and diesel models compare directly.

The real-world drivability difference is noticeable during quick highway overtakes. Petrol engines provide a much more punchy power delivery. However, you will feel fantastic low-end torque in the diesel mode. This torque is extremely helpful during difficult off-road climbs.

Petrol vs Diesel Comparison: Cost

Thar running cost

To understand the true running cost difference, we must use the Mahindra Thar real-world average mileage. Do not just rely on the official ARAI figures.

For calculation purposes:

• Petrol price assumed at Rs. 100 per litre.

• Diesel price assumed at Rs. 90 per litre.

   

When you factor in realistic conditions, the difference becomes quite substantial. The diesel variant of the Thar costs much less per kilometre. Your running cost with the petrol is roughly Rs. 10.52 per kilometre. The diesel running cost drops to just around Rs. 7.82 per kilometre. The diesel version remains significantly more economical for high-mileage users.

Monthly & 5-Year Fuel Cost Projection

Let us assume a realistic scenario of driving 1500 km monthly. This will help us find your total fuel expenses. We compare the Mahindra Thar in both fuel versions.

The savings with diesel are massive over a five-year period. You save roughly Rs. 4,050 every single month on fuel. You will recover the upfront Rs. 80,000 premium quite quickly. It takes just about 20 months to cover this specific difference. After that, you enjoy pure savings on your daily commutes.

Practical Ownership Tradeoffs

Whether you are buying a new or a used Mahindra Thar, here are the things you need to consider before deciding between the powertrain options:

1. Engine Refinement: The petrol engine is incredibly smooth and almost silent inside. The diesel engine produces a noticeable clatter during morning cold starts.
2. Variant Availability: Both fuel types are available across most major variant trims. You can easily find manual and automatic options for both.
3. DPF Issues: Modern diesel engines come with a diesel particulate filter. These filters can clog up if driven only in slow traffic.
4. Maintenance & Reliability: Diesel cars typically require slightly higher periodic maintenance costs. However, Mahindra engines are known to be reliable and durable.

5. Resale Value: Diesel SUVs usually enjoy a much stronger resale demand in India.

    

Thar Petrol vs Diesel: Who Should Buy Which

Here is a quick summary for your final buying decision.

Choose Petrol if:

1. Your daily commute is short and mostly inside heavy traffic.
2. You prefer absolute silence and top-tier engine refinement.

3. You want a strong and punchy performance for highway overtakes.

    

Choose Diesel if:

1. Your daily commute easily exceeds 50 kilometres every day.
2. You want the absolute lowest daily running costs possible.
3. You plan to do extensive long-distance highway touring frequently.