What is the most economical car I can buy?

Wednesday, 30 July 2025

When buying a new car, we can often get excited about new features, its colour, and look, but it is also a great idea to consider running costs. Fuel prices fluctuate, but it’s rare that they drop a huge amount, so your new car needs to be affordable to fill up, especially if you use it regularly. This guide will show you some of the most economical cars available, helping you pick the right one for you.

We also have a helpful guide to buying a used car for you to read before you purchase anything second-hand.

Click on a model to jump to more information.

Hyundai IONIQ PHEV
Kia Niro PHEV
Mercedes E 300 de
Skoda Octavia
Volkswagen Golf
Suzuki Swift

Hyundai IONIQ PHEV

The Ioniq PHEV with its large battery pack is far more efficient than its diesel counterparts, and when fully charged, has a range of 25 to 30 miles on electric power alone, although the petrol engine does provide a boost when you push the accelerator hard. It has a motorway fuel economy of up to 70mpg. Hyundai also makes a non-plug-in version of the Ioniq, which is less efficient but cheaper.

Official Miles Per Gallon (MPG): 62.8mpg

Claimed electric range: 39 miles

Kia Niro PHEV

The Kia Niro Plug-in Hybrid makes a great family car thanks to its size, plus offers excellent fuel economy. It has all the benefits of an off-road car, with the comfort and stability of a standard hatchback. The hybrid system will power the car on electric energy alone for around 35 miles, meaning longer journeys can be boosted with the petrol system.

Official Miles Per Gallon (MPG): 53.3 – 64.2mpg

Claimed electric range: 35-40 miles

Mercedes E 300 de

The Mercedes E-Class comes in the choice of a petrol or diesel plug-in hybrid car. Both the Mercedes E 300 de (diesel) and E 300e (petrol) have official fuel economy figures of more than 150mpg, with the diesel a little more efficient for longer journeys, hence it pipped the petrol version to the post. On electric power alone, both achieve around 30-35mpg.

Official Miles Per Gallon (MPG): 201.8mpg

Claimed electric range: 33 miles

Skoda Octavia

The Skoda Octavia stands out as one of the most fuel-efficient family cars, offering both petrol and diesel engine options with exceptional mileage. The diesel variant achieves up to 68mpg, making it ideal for long-distance commuters, while the petrol models deliver impressive efficiency for city driving. Its low running costs and advanced aerodynamics make it a favourite among economy-focused drivers.

Official Miles Per Gallon (MPG): 68.9mpg

Most efficient model variant: SE Technology hatchback 116PS (Manual)

Volkswagen Golf

The Volkswagen Golf combines legendary reliability with remarkable fuel efficiency, offering petrol, diesel, and plug-in hybrid options. The plug-in hybrid Golf GTE achieves up to 200mpg under optimal conditions, while diesel models excel at around 64mpg for extended journeys. Its energy-saving technology and compact design ensure wallet-friendly fuel consumption.

Official Miles Per Gallon (MPG): 68.9mpg

Most efficient model variant: Match 2.0 TDI (Manual), Estate 2.0 TDI, MK8

Suzuki Swift

The Suzuki Swift shines as a compact hatchback with superb fuel economy, featuring a mild-hybrid petrol engine that enhances efficiency. Capable of achieving up to 65mpg, it’s perfect for both urban commutes and short trips. Lightweight construction and a clever hybrid system make it one of the most economical choices in its class.

Official Miles Per Gallon (MPG): 64.0mpg

Most efficient model variant: Motion (Manual)

Looking for an economical used car? Check out our salvage auction.

Let ASM help you find the best used car

We have plenty of other guides to help you on our blog, so be sure to check for the latest advice.

If you are on the hunt for your next car, ASM Auto Recycling has consistent stock of repairable vehicles, offering regular online auctions supported by our site in Thame, Oxfordshire. For help buying used cars at online auctions, read our full guide.

We can also take unwanted used cars to be scrapped, recycled, and resold where possible. Contact us today to discuss your needs. ASM is an Authorised Approved Treatment Facility.

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