RealCost Guide
Cheapest Petrol Cars to Run UK
Petrol cars are still one of the most practical low-cost choices for many UK drivers, especially if you do lower mileage, want simple servicing or do not have home charging.
This guide compares practical petrol cars that can be cheaper to run in the UK, focusing on fuel economy, insurance, tyres, servicing, reliability, purchase price and when petrol beats hybrid or electric.
The simple answer
The cheapest petrol cars to run are usually small, light, simple and cheap to insure. Dacia Sandero, Kia Picanto, Hyundai i10, Toyota Aygo X, Skoda Fabia, Volkswagen Polo, Renault Clio and Suzuki Swift are all sensible petrol cars to compare.
Petrol often makes most sense if you do modest mileage, want a lower purchase price than many hybrids or EVs, and do not drive enough miles for fuel savings to outweigh a higher upfront cost.
Quick shortlist: cheap petrol cars to run
Use this as a shortlist, then check insurance, real MPG, tyre size, servicing and used-car condition.
Dacia Sandero
From £15,000. Insurance group 12-14, up to 52.3mpg WLTP combined.
Best for: value and useful space.
Kia Picanto
From around £16,000-£20,600. Insurance groups start from group 1, 52-58mpg combined.
Best for: city driving and first cars.
Hyundai i10
From around £16,500-£21,100. Insurance group 1 on the base engine, rising to 3-4 on higher trims. 50-55mpg (low-to-mid 40s real-world in town).
Best for: low-mileage local driving.
Toyota Aygo X (now hybrid-only)
Important: the 2026 facelift moved the whole Aygo X range to a self-charging hybrid, retiring the old petrol “Pure” version. From £21,645-£27,000, insurance group 16-19. If you want genuine petrol, look at a used pre-2026 Aygo X (petrol, insurance group 5-6) instead.
Best for: urban use and second cars.
Skoda Fabia
Insurance groups span a wide range (roughly 1-27 across the model line), so engine and trim matter more than on most cars on this list.
Best for: practical small-car ownership.
Suzuki Swift
From £19,999-£22,349. 64.2mpg manual/60.1mpg CVT official (54mpg real-world), but insurance group 19-27 – genuinely higher than most cars on this list, worth quoting before assuming it’s cheap overall.
Best for: efficient petrol driving.
RealCost note: Petrol cars can still be the cheapest option when mileage is modest and purchase price matters. Use the Car Cost Calculator UK to check full ownership cost, then compare fuel cost with the Fuel Cost Per Mile Calculator UK.
Best cheap petrol car by situation
Petrol is strongest when the car is simple and matched to the mileage.
Lowest purchase cost
Dacia Sandero and used small petrol hatchbacks are often worth comparing first.
City driving
Kia Picanto, Hyundai i10 and Toyota Aygo X suit short trips and local use.
More space needed
Skoda Fabia, Volkswagen Polo, Renault Clio or Dacia Sandero are more usable than tiny city cars.
Low-mileage driver
A simple used petrol car may beat a more expensive hybrid or EV if annual mileage is low.
Cheap petrol cars to run: practical examples
These are practical examples, not a fixed ranking. The cheapest petrol car for you depends on mileage, insurance, budget and condition.
Dacia Sandero
From £15,000 – one of the cheapest brand-new cars sold in the UK by a clear margin. Insurance group 12-14, up to 52.3mpg WLTP combined. Simple, value-focused and avoids the premium feel that often adds cost.
Best for: drivers who want a simple, affordable petrol car with practical space.
Watch out: do not assume every trim is equally cheap. Compare insurance and used values carefully.
Kia Picanto
RRP roughly £16,000-£20,600. Insurance groups start from group 1 – among the lowest of any car sold in the UK – and combined economy runs 52-58mpg.
Best for: city driving, short commutes and first-car buyers.
Watch out: it is less suited to regular long motorway journeys or families needing proper space.
Hyundai i10
RRP roughly £16,500-£21,100. Insurance group 1 on the base 1.0-litre automated-manual, rising to 3-4 on higher-trim 1.2-litre versions – sensible for people who want affordable petrol ownership without paying extra for hybrid or electric technology.
Best for: low-mileage drivers, local commuting and city use.
Watch out: quote insurance first if it is for a young or new driver.
Toyota Aygo X
Important: the 2026 Aygo X is no longer sold as petrol at all – the facelift moved the whole range to a 1.5-litre self-charging hybrid (insurance group 16-19, from £21,645). If you specifically want a petrol Aygo X, you’re looking at a used pre-2026 model (insurance group 5-6), not a new one.
Best for: urban driving, new drivers and households needing a simple second car.
Watch out: check whether the crossover styling adds cost without giving enough extra practicality.
Skoda Fabia
Fabia insurance groups span a wide range (roughly 1-27 across the model line), so the exact engine and trim matter more than on most cars on this list. It offers useful space, comfort and efficient petrol options.
Best for: drivers who want a practical small petrol car without SUV running costs.
Watch out: engine, gearbox and trim can change fuel economy, insurance and repair costs.
Volkswagen Polo
From £22,055-£28,635. The entry-level 1.0-litre sits in insurance group 1 and can return up to 60mpg, but the turbocharged 1.0-litre TSI starts at group 8 – a genuinely different insurance picture depending on engine choice. It is rarely the absolute cheapest to buy new, but can be a good option if you want a more refined small car.
Best for: commuters who want comfort while keeping petrol running costs manageable.
Watch out: purchase price, repairs and insurance may be higher than simpler budget rivals.
Renault Clio
From £17,820 for the 1.0 TCe petrol. Official economy around 54.3mpg (just under 50mpg real-world), insurance groups 3-14 depending on trim, £190/year flat-rate VED. Offers more comfort than many tiny city cars.
Best for: mixed driving, commuting and everyday comfort.
Watch out: compare petrol and hybrid versions carefully before deciding which is cheaper overall.
Suzuki Swift
From £19,999-£22,349. Official economy 64.2mpg manual/60.1mpg CVT (54mpg real-world), but insurance groups run 19-27 – the SZ5 1.0 Boosterjet sits at the top of that range, genuinely higher than most small petrol cars, so quote it carefully before assuming it’s cheap overall.
Best for: drivers who want an efficient petrol hatchback with low weight and simple ownership.
Watch out: check real insurance, parts availability and whether the size suits your daily use.
What makes a petrol car cheap to run?
The best low-cost petrol cars keep several costs low at the same time.
Real-world fuel economy matters more than brochure figures.
A small engine and sensible trim can help reduce premiums.
Straightforward petrol engines can be cheaper to maintain.
Small wheels usually cost less than large SUV or performance tyres.
A cheap car is not cheap if it constantly needs repairs.
Used petrol cars may avoid the steepest new-car value loss.
Calculate your petrol car running costs
Use this calculator after shortlisting a petrol car. Include fuel, insurance, road tax, servicing, MOT, tyres, repairs, depreciation and other monthly costs so you can see the real monthly cost.
Purchase & depreciation
Running costs
Other costs (optional)
For fuel specifically, use the Fuel Cost Per Mile Calculator UK after checking the full ownership cost.
New petrol cars vs used petrol cars
The cheapest choice is often a well-maintained used petrol car, not necessarily a brand-new one.
New petrol car
Better warranty protection and fewer unknowns, but higher purchase price and more depreciation risk.
Used petrol car
Lower purchase price and less depreciation, but condition, MOT history and servicing matter much more.
Best value route: for many cost-conscious drivers, a well-maintained used petrol car with sensible insurance can beat a newer hybrid or EV on total cost.
When petrol is the cheapest choice
Petrol is strongest when purchase price and simplicity beat fuel savings.
When petrol may not be cheapest
Petrol is not automatically the best answer for every driver.
Fuel cost can become too high if annual mileage is heavy.
Hybrid fuel savings may beat petrol in stop-start driving.
EV running costs can be lower if you can charge cheaply at home.
Fuel, tyres and insurance can make them expensive fast.
Compare fuel types: use Petrol vs Hybrid vs Electric: Which Is Cheapest to Run UK? before assuming petrol, hybrid or EV is automatically best.
Petrol car costs people forget
Even a cheap petrol car has costs beyond fuel.
How to choose the cheapest petrol car for your situation
Choose the car that fits your real life, not the one with the best headline MPG.
Petrol running cost is not one number
Use these calculators to check the full cost before buying.
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Related petrol and running-cost guides
Use these guides to decide whether petrol, hybrid or electric is cheapest for your situation.
Cheapest Used Cars to Run UK
Used petrol cars can be strong value if condition is right.