Mahindra Thar Roxx Mileage Comparison: Petrol vs Diesel (2026)

The Mahindra Thar Roxx is a premium off-road SUV for families looking for a standout lifestyle vehicle. It offers rugged capability and exceptional on-road presence. You can choose between petrol and diesel engine options. The petrol engine gets a manual or automatic transmission. The diesel version comes with similar transmission choices. 

This Mahindra Thar Roxx mileage comparison matters for daily running costs. Buyers wanting smooth performance often prefer the petrol variant. Value-conscious drivers focus on the higher fuel efficiency of the diesel model.

Variant-Wise Price Difference

Before we proceed with the Thar Roxx mileage comparison, consider the price gap. Let us look at the ex-showroom price difference for the base MX1 variant.

There is a noticeable premium for the diesel engine. You pay an extra ₹1.21 Lakh for the base MX1 diesel.

Mahindra Thar Roxx ARAI Mileage Figures

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

Disclaimer: Thar Roxx ARAI mileage is not equivalent to real-world averages. Laboratory tests exclude real-road traffic conditions and air conditioning usage.

Mahindra Thar Roxx Mileage vs Competitors

The Hyundai Creta delivers a higher petrol average compared to the Mahindra SUVs. However, the Thar Roxx offers superior off-road capabilities and road presence.

The Mahindra Thar Roxx diesel achieves a very reasonable highway average considering its boxy proportions and heavy kerb weight. If you are seeking a more family-oriented SUV with a slightly softer ride, exploring the Mahindra Scorpio N mileage comparison shows an efficient 16.23 km/l for the diesel and up to 13.27 km/l for the turbo-petrol.

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

Below is the real-world average of the Mahindra Thar Roxx in actual conditions. 

In city driving, the Thar Roxx petrol manual typically delivers around 10-12 km/l. The diesel automatic returns slightly better figures of 11-13 km/l. On the highway, the gap remains consistent. The petrol manual offers approximately 13-15 km/l. The diesel variant stretches further with 14-16 km/l. 

Real-world numbers differ from ARAI figures due to traffic and AC usage. City traffic impacts fuel 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.

Thar Roxx Petrol vs Diesel: Performance Comparison

Beyond Thar Roxx fuel efficiency, here is how the performance specs compare.

The real-world drivability difference is noticeable during quick highway overtakes. The petrol engine provides rapid acceleration and extremely smooth power delivery. The diesel engine offers excellent low-end torque for off-road trails.

Petrol vs Diesel: Cost Comparison

Thar Roxx running cost

To understand the true running cost difference, we must use accurate data. We will rely on the Mahindra Thar Roxx real-world average mileage.

For calculation purposes:

• Petrol price assumed at ₹100 per litre.

• Diesel price assumed at ₹90 per litre.

   

When you factor in realistic driving conditions, the difference is clear. The diesel variant of the Thar Roxx is noticeably cheaper to run. Your running cost with the Mahindra Thar Roxx petrol is roughly ₹8.33. The Thar Roxx diesel running cost drops to around ₹6.42 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.

The savings with diesel are substantial over a five-year period. You save roughly ₹2,857 every single month. You will recover the upfront ₹1.21 Lakh premium over time. It takes just about 42 months to cover this 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 Roxx, here are the things you need to consider before deciding between the powertrain options:

• Refinement

   

The petrol engine is exceptionally quiet and refined at idle.

The diesel engine produces a slight clatter during morning starts.

• Maintenance & Reliability

   

Diesel engines may require slightly more expensive routine maintenance.

Modern diesel cars also have DPF systems needing highway runs.

• Resale Value

Both petrol and diesel variants enjoy very strong resale demand.

Diesel SUVs hold their value incredibly well in rural areas.

Thar Roxx Petrol vs Diesel: Who Should Buy Which

Here is a quick summary for your buying decision.

Choose Petrol if:

1. Your monthly running is less than 1000 kilometres.
2. You prefer an incredibly silent and refined cabin experience.

3. You want the lowest possible initial purchase price.

    

Choose Diesel if:

1. Your daily commute exceeds 50 kilometres regularly.
2. You frequently travel on the highway with full luggage.
3. You want the lowest daily running costs possible.