Parkers overall rating: 4.5 out of 5 4.5

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 8.6 - 12.3 mpp
Diesel engines 11.0 - 13.3 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 40.4 - 57.6 mpg
Diesel engines 54.3 - 65.7 mpg
  • Low-cost petrol engines
  • Cheap to insure, maintain and service
  • Mild hybrid tech as of 2020, but no hybrid or electric version

As of 2020, the Fiesta engine range became available with petrol engines only. Prior to this, the cheapest Fiesta to run when it came to fuel bills was the 1.5-litre 85hp diesel, which returned between 55.4-60.1mpg on the combined cycle. We doubt you’ll see that sort of economy in the real world, however, because you’ll have to work the motor quite hard to make meaningful progress.

However, all the petrol engines remain relatively cheap to run and aren't far behind when it comes to fuel economy and mpg figures. The entry-level 1.1-litre 75hp achieves between 52.3-53.3mpg, but as it needs to be worked harder than most of the other engines, we suspect it'll be more difficult to reach these figures consistently.

Opt for one of the 1.0-litre engines and you also get cylinder deactivation, switching off one of the three cylinders when coasting or cruising without requiring much of the engine's power to further conserve fuel. As a result:

  • The 95hp version achieves between: 52.3-55.4mpg
  • The 125hp with the automatic gearbox drops to 47.9-49.6mpg

The seven-speed automatic gearbox on the 125hp engine replaced the six-speed version on the previous 100hp output and claims to be slightly more economical, despite the added performance.

Mild hybrid technology was also introduced as part of the 2020 update and you can have this system on the 125hp engine (with a manual gearbox), or the more powerful 155hp variant. Badged Ecoboost Hybrid, this occasionally uses electrical assistance to help nudge the petrol engine along, removing some of the strain and hence, using a little less fuel. This also results in a more effective stop-start system that shuts the petrol engine off sooner, when coasting below 15mph.

This is not to be confused as a fully-fledged hybrid model, and while the result may be small and incremental, every little helps. It certainly seems more active than the Mazda 2 with the same tech. In the cabin, the driver will spot a couple of subtle differences on the trip computer - chiefly a cog symbol that appears when accelerating under the engine’s power and a battery logo when you are not, typically when using the regenerative braking and start-stop.

There's also an additional readout on the trip computer to further display this in detial using a meter in accordance to your driving behaviour.

As a result, the most economical engine in the range goes to the 125hp Ecoboost Hybrid, with figures of 52.3-56.5mpg. Even the more powerful 155hp engine matches the lower-powered 95hp engine's 52.3-55.4mpg figures.

During our time of testing with the 125hp Ecoboost Hybrid, we saw an indicated 49mpg after a long motorway journey, before creeping down to 48.7mpg in town. As a result, we'd say it's fair to expect mpg figures of mid-high 40s. Fuel range was also good indicating over 400 miles per tank.

The high-performance Fiesta ST is the least economical, at 42.8mpg.

Green credentials

None of the engines are particularly bad in this respect, either, with:

  • The 1.1-litre 75hp at 121g/km
  • The 1.0-litre Ecoboost 95hp at 116-124g/km
  • The 1.0-litre Ecoboost 125hp automatic at 129-134g/km
  • The 1.0-litre Ecoboost Hybrid 125hp at 114-123g/km
  • The 1.0-litre Ecoboost Hybrid 155hp at 116-123g/km

The Fiesta ST emits the most CO2, with 149-150g/km.

We ran a Fiesta 1.0-litre 125 Titanium as a long-termer. Find out how we got on with it here

Financing costs generally range from £125 - £150 per month with a 10% deposit for basic Fiestas - rising to around £250 for the most expensive Fiesta, the ST. As the Fiesta grows older, its finance deals become better. So keep a lookout for these deals, like 0% APR on finance, and money off for scrapping your old car.

Insurance groups range from 5E up to 15E - the Fiesta ST is 28E - so it’s at the cheaper end of the spectrum here too, and fuel economy and tax bills are very low indeed thanks to a recent range of high-tech engines.

Ford has famously favorable servicing and maintenance costs, including fixed-price packages, along with an extensive dealer network.

Reliability

  • Cabin feels of reasonable quality – better than before, but not near the head of the class 
  • Tried and tested engines and running gear, should translate to reliability 
  • Recent Ford dependability has been above average, but with niggles through being built to a price

Despite being smaller and cheaper, the Ford Fiesta feels as well built as any other Fords, such as the Focus and Mondeo – but it's clearly built to a price.

The quality of the interior especially stands out as being good in your line of sight, but expect the new Volkswagen Polo to move on the game in that regard.

Our owners' reviews don't show any prevailing problems with the previous generation of Fiesta's reliability either - with just one disgruntled owner who appeared to have had a number of issues. This could easily be an isolated incident.

During the car's lifespan, it's only had one recall - a precautionary one regarding a brake servo. If you're buying a used Fiesta, make sure this has been done. It should be noted that 99% will have had the work completed - but it's just worth checking.

Ongoing running costs

Road tax (12 months) £150
Insurance group 2 - 30
How much is it to insure?