Diesel Cars With Best Mileage You Can Buy Under Rs 20 Lakh

With rising fuel prices, diesel cars remain a smart choice for Indian buyers, especially for those doing occasional road trips and long daily commutes. These models offer good performance, space, and low running costs.

Below are some cars under ₹20 lakh (ex-showroom) with the best ARAI-claimed mileage.

We have divided this list into two parts, under 10 lakhs and under 15-20 lakh, to further simplify your reading experience.

Diesel Cars With Best Mileage Under 10 Lakhs

Also Read - Upcoming Cars in 2026 Under ₹10 Lakh
 

Tata Altroz

The Tata Altroz is the only premium hatchback offering a diesel among its rivals, and stands out for its strong build and top safety ratings.

It comes with a 1.5-litre turbo diesel engine delivering 90 bhp and 200 Nm of torque, mated to a 5-speed manual transmission.

The ARAI claimed mileage is up to 25.1 kmpl, which makes it one of the most fuel-efficient diesel cars in its segment.

The Altroz offers a spacious cabin, a comfortable ride, and modern features like dual 10.25-inch screens with Android Auto and Apple CarPlay, automatic climate control in higher variants, and a 360-degree camera in top trims.

Standard safety features include six airbags, ABS with EBD, electronic stability program, tyre pressure monitoring system, rear parking sensors, ISOFIX child seat mounts, seat belt reminders, and a 5-star Bharat NCAP rating.

Tata Nexon

The Tata Nexon is a compact SUV known for its bold design and excellent safety.

It features a 1.5-litre Revotorq turbo diesel engine producing 113 bhp at 3750 rpm and 260 Nm at 1500-2750 rpm, available with a 6-speed manual or AMT transmission. The ARAI claimed mileage goes up to 24.08 kmpl for the manual variant, ensuring low fuel bills on long trips.

The Nexon provides a roomy interior, good ground clearance for bad roads, and amenities like a 10.25-inch touchscreen with wireless Android Auto and Apple CarPlay, automatic climate control, and ventilated front seats in its top variants.

Standard safety features consist of six airbags, ABS with EBD, electronic stability control, hill hold assist, tyre pressure monitoring system, rear parking camera, ISOFIX anchors, and a 5-starGlobal and Bharat NCAP rating.

Also Read - All We Know About Next Generation Nexon AKA Tata Project Garud
 

Kia Sonet

The Kia Sonet is a feature-packed compact SUV with attractive looks and smooth drive.

It uses a 1.5-litre turbo diesel engine delivering 114 bhp at 4000 rpm and 250 Nm at 1500-2750 rpm, available with a 6-speed manual, iMT, or torque converter automatic transmission. The ARAI claimed mileage reaches up to 24.1 kmpl for the manual, making it economical for daily runs.

The Sonet offers a spacious interior, good boot space, and highlights like a 10.25-inch touchscreen with wireless Android Auto and Apple CarPlay, ventilated front seats, sunroof, and Bose sound system in top models.

Standard safety features cover six airbags, ABS with EBD, electronic stability control, vehicle stability management, hill start assist, tyre pressure monitoring system, and ISOFIX anchors. Higher variants add a 360-degree camera and Level 2 ADAS.

Also Read - Kia Sonet X-Line Review: The Good, the Bad and Everything In Between
 

Mahindra XUV 3XO

The Mahindra XUV 3XO offers a tough build and high features. It has a 1.5-litre turbo diesel engine producing 115 bhp and 300 Nm, offered with a 6-speed manual or AMT transmission. The ARAI claimed mileage is up to 21.2 kmpl for the AMT and 20.6 kmpl for the manual, providing decent efficiency for its power.

The XUV 3XO boasts a roomy cabin, panoramic sunroof in higher trims, and amenities such as a 10.25-inch touchscreen with wireless Android Auto and Apple CarPlay, dual-zone climate control, and ventilated seats.

Standard safety features include six airbags, ABS with EBD, electronic stability program, hill hold control, tyre pressure monitoring system, rear parking sensors, ISOFIX mounts, and Level 2 ADAS on higher trims. It has a 5-star Bharat NCAP rating.

Hyundai Venue

The Hyundai Venue is a stylish compact SUV that received a full generational update in November 2025, with a larger body, more cabin space, and a fresh interior.

It is powered by a 1.5-litre turbo diesel engine producing 114 bhp and 250 Nm, now available with a 6-speed manual or a 6-speed torque converter automatic for the first time. The ARAI claimed mileage is up to 20.99 kmpl for the manual version.

The Venue has a thoroughly updated cabin with dual 12.3-inch curved displays for infotainment and instruments, ventilated front seats, a 360-degree camera, reclining rear seats, automatic climate control, and Level 2 ADAS in the top variant.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill start assist, tyre pressure monitoring system, and ISOFIX child seat mounts. The new Venue has a 5-star Bharat NCAP safety rating.

Also Read - Top 10 Big SUVs Under ₹15 Lakh
 

Diesel Cars With Best Mileage Under 15 Lakhs

Kia Syros

The Kia Syros is a compact SUV with bold styling and family-friendly features.

It is powered by a 1.5-litre turbo diesel engine delivering 116 bhp and 250 Nm, paired with a 6-speed manual or 6-speed torque converter automatic. The ARAI claimed mileage is up to 20.75 kmpl for the manual and 17.65 kmpl for the automatic.

The Syros offers a comfortable interior, good space, and amenities such as dual 12.3-inch displays, ventilated front and rear seats, a panoramic sunroof, and flush door handles.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill start assist, tyre pressure monitoring system, and ISOFIX anchors. Top trims add a 360-degree surround view and Level 2 ADAS. It has a 5-star Bharat NCAP safety rating.

Hyundai Creta

The popular Hyundai Creta offers a refined ride and lots of space. It features a 1.5-litre turbo diesel engine that outputs 114 bhp at 4000 rpm and 250 Nm at 1500-2750 rpm, with 6-speed manual or torque converter automatic transmission.

The ARAI claimed mileage is up to 21.8 kmpl for the manual diesel variant and 19.1 kmpl for automatic, ensuring low costs on highways.

The Creta provides a comfortable interior, large boot, and key highlights like a 10.25-inch touchscreen with wireless Android Auto and Apple CarPlay, Bose sound system, panoramic sunroof, and ventilated seats.

Standard safety features include six airbags, ABS with EBD, vehicle stability management, electronic stability control, hill start assist, tyre pressure monitoring system, and ISOFIX child seat anchors. Top-end variants add more features including Level 2 ADAS.

Also Read - Third-Generation Hyundai Creta Spied Testing for the First Time
 

Kia Seltos

The Kia Seltos gets a sharp new design and a significantly updated cabin in its second generation, launched in January 2026. It carries a 1.5-litre turbo diesel engine producing 116 bhp and 250 Nm, available with a 6-speed manual or torque converter automatic.

The ARAI claimed mileage is up to 19.4 kmpl for the manual diesel, down slightly from the outgoing model due to the new generation's added size and weight.

The Seltos has a spacious interior, and features a 12.3-inch touchscreen with a 12.3-inch digital cluster, wireless charging, panoramic sunroof, ventilated seats, and dual-zone climate control.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill hold assist, tyre pressure monitoring system, and ISOFIX anchors. Higher variants add Level 2 ADAS. It has a 5-star Bharat NCAP safety rating.

Kia Carens

The Kia Carens is a popular MPV known for its spacious layout and premium feel. It features a 1.5-litre diesel engine delivering 113 bhp and 250 Nm, mated to a 6-speed manual transmission. The ARAI claimed mileage is up to 21.3 kmpl, offering good fuel savings for family use.

The Carens now comes in a single Premium (O) variant only, while the rest of the range has been moved to the more premium Carens Clavis. It provides 7-seat layout, and features include an 8-inch touchscreen with Android Auto and Apple CarPlay.

Standard safety features include six airbags, ABS with EBD, electronic stability control, vehicle stability management, hill start assist, tyre pressure monitoring system, and ISOFIX anchors.

Also Read - Every MPV You Can Buy In 2026
 

Tata Sierra

The Tata Sierra features a 1.5-litre turbo diesel engine producing 116 bhp and 280 Nm, available with a 6-speed manual or a 6-speed torque converter automatic.

It delivers an ARAI-certified fuel efficiency of 21.26 kmpl for the manual and 19.22 kmpl for the automatic.

The Sierra provides a premium and spacious cabin, good ground clearance, and features like a triple-screen setup with wireless Android Auto and Apple CarPlay, a panoramic sunroof, JBL audio with Dolby Atmos, and a 622-litre boot in the standard 5-seat layout.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill hold and descent control, tyre pressure monitoring system, rear parking sensors, and ISOFIX child seat mounts. Its top-end variants get Level 2 ADAS.

Kia Carens Clavis

The Kia Carens Clavis is essentially a more upmarket Carens. It comes with a 1.5-litre turbo diesel engine producing 114 bhp and 250 Nm, available with a 6-speed manual or 6-speed torque converter automatic. The ARAI claimed mileage is up to 19.54 kmpl for the manual version.

The Carens Clavis has a roomy cabin with modular seats and a large boot. Features include dual 12.3-inch screens with wireless Android Auto and Apple CarPlay, automatic climate control, a panoramic sunroof in higher variants, and Level 2 ADAS on top trims.

Standard safety features consist of six airbags, ABS with EBD, electronic stability control, hill start assist, tyre pressure monitoring system, rear parking camera, and ISOFIX child seat mounts. Level 2 ADAS suite is offered on top variants.

Also Read - Kia Opens Pre-Bookings for the Sorento Ahead of Its Expected October Launch
 

Mahindra Scorpio N

The Mahindra Scorpio N is powered by a 2.2-litre mHawk turbo diesel engine that delivers 175 bhp and 400 Nm of torque (450 Nm in automatic), paired to a 6-speed manual or automatic transmission with RWD or 4WD drivetrains.

The ARAI claimed mileage is up to 15.94 kmpl for manual diesel and 15.42 kmpl for automatic.

The 2026 Scorpio N facelift gets a panoramic sunroof, a 12.3-inch touchscreen, a 540-degree camera system, and updated 18-inch alloy wheels. It seats 6 or 7 depending on the variant.

Standard safety features include six airbags, ABS with EBD, all four disc brakes, electronic stability control, and ISOFIX child seat mounts. It has a 5-star Global NCAP rating.

Tata Harrier

The Tata Harrier is powered by a 2.0-litre Kryotec turbo diesel engine delivering 170 bhp and 350 Nm, paired with a 6-speed manual or automatic transmission.

The ARAI claimed mileage is 16.8 kmpl for both manual and automatic diesel variants.

The Harrier provides a spacious five-seater cabin, good boot space, and features like a 12.3-inch touchscreen with wireless Android Auto and Apple CarPlay, ventilated seats, panoramic sunroof, and Level 2 ADAS in higher trims. It is excellent for buyers wanting a safe, refined diesel SUV with balanced mileage.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill-hold, tyre pressure monitoring, and ISOFIX anchors. It has a 5-star Bharat NCAP rating.

Update - Both Harrier and Safari now come with Dark and Red Dark Edition in Diesel Range.

Tata Safari

The Tata Safari is equipped with the same 2.0-litre Kryotec turbo diesel engine as the Harrier, producing 170 bhp and 350 Nm, paired with a 6-speed manual or automatic transmission.

The ARAI claimed mileage is up to 16.3 kmpl for manual diesel and 14.8 kmpl for automatic.

The Safari offers comfortable seating for 6 or 7 passengers, a large boot, and features like a 12.3-inch touchscreen with wireless Android Auto and Apple CarPlay, panoramic sunroof, ventilated seats, and Level 2 ADAS.

Standard safety features include six airbags, ABS with EBD, electronic stability control, hill-hold, TPMS, and ISOFIX seat mounts. It boasts a 5-star Bharat NCAP rating.

Also Read - The First Ever Spy Shots Of The Tata Safari EV Are Out
 

Mahindra XUV 7XO

The Mahindra XUV 7XO comes with a 2.2-litre mHawk turbo diesel engine producing 182 bhp and up to 450 Nm of torque, available with a 6-speed manual or automatic transmission and 2WD or AWD options.

The ARAI claimed mileage is 17 kmpl for the diesel manual and 16.57 kmpl for the automatic.

The XUV 7XO offers a spacious 6 or 7-seater cabin, a triple-screen dashboard powered by Snapdragon internals, a panoramic sunroof, ventilated seats, dual-zone climate control, and a 16-speaker Harman Kardon system with Dolby Atmos.

Standard safety features include seven airbags, ABS with EBD, electronic stability control, Mobileye Level 2+ ADAS, a 540-degree camera, and ISOFIX mounts. It has a 5-star Bharat NCAP rating.

Image Source: CarHP.in (Self taken), Respective Carmakers