Best Fuel-Efficient SUVs for Big Families

Big families need big space — but that doesn’t mean accepting big fuel bills. With rising costs and environmental concerns, many families are looking for a fuel efficient SUV that can carry everyone comfortably while going easy on the pump.

This guide highlights the best MPG SUVs in 2025, covering hybrid, plug-in hybrid, and petrol models that deliver strong family car fuel economy. Whether you’re running the school route or taking a weekend road trip, these SUVs combine space with smarter fuel use.

What Makes an SUV Fuel Efficient in 2025?

Today’s efficient SUVs use advanced engines, hybrid systems, and smart aerodynamics to reduce fuel use.

Key Fuel-Saving Features to Look For:

• Hybrid or plug-in hybrid engines
• Stop-start systems that save fuel in traffic
• CVT or fuel-optimised automatic transmissions
• Lightweight construction for better performance
• Regenerative braking in hybrid models
• Drive mode selectors (e.g., eco mode for smoother driving)

Smarter design means fewer stops at the fuel station — even with a full vehicle.

How Fuel Economy Is Measured

In the UK, fuel efficiency is measured in miles per gallon (MPG) or litres per 100 kilometres (L/100km).

Quick Reference:

• Above 45 MPG (6.2 L/100km) is considered excellent for a large SUV
• Between 35–45 MPG (6.2–8.0 L/100km) is still very good
• Plug-in hybrids offer even better numbers, especially for short trips using electric-only power

Check both city and motorway figures, as family vehicles often face both types of driving.

Top Fuel-Efficient SUVs for Big Families in 2025

Here are the top picks offering seating for 6–8 passengers, generous cargo space, and class-leading fuel efficiency.

1. Toyota Highlander Hybrid (2025)

Seats: 7–8

Fuel Economy: Up to 50 MPG combined

Why It’s Efficient: Toyota’s hybrid tech leads the segment. The Highlander balances strong electric support with a smooth petrol engine.

Family Features: Flat-folding third row, top safety scores, quiet cabin, and plenty of boot space even with all seats up.

2. Kia Sorento Hybrid (2025)

Seats: 6–7

Fuel Economy: Up to 48 MPG combined

Why It’s Efficient: The Sorento’s full hybrid system allows electric-only driving at low speeds, perfect for school runs and local errands.

Family Features: USB ports in all rows, optional captain’s chairs, and a well-designed infotainment setup.

3. Ford Explorer Plug-In Hybrid (PHEV)

Seats: 7

Fuel Economy: 78 MPG equivalent (PHEV rating) Electric Range: Up to 30 miles

Why It’s Efficient: Charge at home and do the morning drop-off on battery alone. Use petrol only on longer trips.

Family Features: Large interior, fast-charging capability, and Ford’s Co-Pilot360 driver assist suite.

4. Hyundai Santa Fe Hybrid (2025)

Seats: 7

Fuel Economy: 47 MPG combined

Why It’s Efficient: The hybrid drivetrain delivers solid performance while keeping fuel use low, especially in stop-start driving.

Family Features: Rear seat alert, Safe Exit Assist, and a boot large enough for weekend getaways.

Want more space? Check out our roundup of Best Family SUVs with Maximum Cargo Space.

5. Toyota RAV4 Plug-In Hybrid (Prime)

Seats: 5

Fuel Economy: 90+ MPG equivalent Electric Range: Up to 40 miles

Why It’s Efficient: One of the highest efficiency ratings in its class, with strong electric-only performance.

Family Features: Flat cargo floor, built-in child safety systems, and class-leading reliability.

6. Volvo XC90 Recharge (PHEV)

Seats: 6–7

Fuel Economy: 73 MPG equivalent Electric Range: Around 30 miles

Why It’s Efficient: Luxury meets efficiency. Volvo’s plug-in system works seamlessly in urban and motorway driving.

Family Features: Minimalist interior, built-in booster seats in the second row, and strong rear crash protection.

7. Lexus RX 500h (2025)

Seats: 5 (spacious second row for car seats or teens)

Fuel Economy: 44 MPG combined

Why It’s Efficient: Combines strong acceleration with hybrid savings. Smooth handling for long-distance family trips.

Family Features: Premium finishes, advanced climate control, and quiet ride for napping toddlers or noisy teens.

Budget-Friendly, Fuel-Efficient SUVs for Larger Families

If you’re shopping under a stricter budget, consider these options with strong family car fuel economy and practical features.

1. Dacia Jogger Hybrid

Seats: 7

Fuel Economy: 56 MPG

Why It’s Efficient: Simple design, reliable performance, and strong fuel savings in both city and rural driving.

Best For: Large families looking for value and space without extra complexity.

2. Peugeot 5008 BlueHDi Diesel

Seats: 7

Fuel Economy: Up to 57 MPG (diesel)

Why It’s Efficient: One of the few large diesel SUVs still delivering top-tier fuel efficiency with room for the whole crew.

Family Bonus: Versatile seating and low running costs.

Fuel Efficiency Tips for Families on the Move

Even the most efficient SUV can waste fuel if not driven wisely. Follow these simple changes to improve your real-world MPG.

Top Driving Tips:

• Use eco driving modes where available
• Reduce roof box use unless needed — it adds drag
• Keep tyres properly inflated
• Remove heavy clutter from the boot
• Accelerate smoothly and brake gently
• Limit idling — turn off the engine during long waits

These habits can boost efficiency by 10–15% — without changing vehicles.

Plug-In vs Hybrid vs Petrol: What’s Best for You?

Not all fuel-saving SUVs use the same tech. Choose based on your driving routine.

Hybrid (HEV):

• Best for short trips and town driving
• No charging needed
• Lower fuel use than petrol alone

Plug-In Hybrid (PHEV):

• Can run on electricity alone for local drives
• Needs home charging for full benefits
• Best mix of petrol range and electric cost savings

Efficient Petrol or Diesel:

• Ideal for long motorway trips
• No charging needed
• Still efficient if driven carefully

How to Choose the Right Fuel Efficient SUV

Think beyond MPG — your SUV needs to fit your lifestyle too.

Ask Yourself:

• How many people ride regularly?
• Is your driving mostly urban or long-distance?
• Can you charge at home or work?
• Do you carry lots of gear?
• What’s your monthly fuel budget?

Then match these needs with the models that offer the best real-world value.

More Miles, Less Money

A fuel efficient SUV helps you save at the pump while carrying the people and gear that matter most. From hybrids to plug-ins, the best MPG SUV 2025 models combine comfort, tech, and smart design to support family life.

Choose a vehicle that delivers real-world savings, not just lab-tested numbers. Because when your family car fuel economy improves, so does your freedom to explore.

Less weight = less fuel use. Use clever packing strategies and hidden storage features like those found in Hidden Storage Features in 2025 SUVs.