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Ford Fiesta ST hatchback - MPG, running costs & CO2

Clever engine technology means the Ford Fiesta ST’s running costs are relatively sensible

Carbuyer Rating

4.3 out of 5

Owners Rating

4.0 out of 5

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MPG, running costs & CO2 Rating

3.5 out of 5

Gone are the days when choosing a performance model means taking a massive hit when it comes to running costs. Today’s hot hatches are designed to balance performance with efficiency and the Ford Fiesta ST is no exception. With an engine that can shut down one of its three cylinders when not required (the first time this technology has appeared on a production three-cylinder engine), the ST can return decent fuel economy and emissions figures despite its considerable performance. The 2.0-litre VW Polo GTI is almost as efficient though, presumably because its larger engine isn’t working as hard.

Ford Fiesta ST MPG & CO2

The Ford Fiesta ST’s 1.5-litre turbocharged three-cylinder petrol engine is powerful, but thanks to some clever technology it manages to be relatively frugal. Between 1,200 and 4,500rpm, or at less than half throttle, the ST’s engine can shut down one of its three cylinders to improve economy by up to 6%, according to Ford. In our experience, the switch between three and two-cylinder drive (and back again) is almost imperceivable.

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Ford quotes an average fuel economy figure of up to 38.9mpg and CO2 emissions of around 150g/km. VED (road tax) will cost the standard rate per year but company-car users will have to contend with a high Benefit-in-Kind (BIK) band. During our time with the car, we matched Ford’s figures across several hundred miles of motorway and town driving.

It’s worth remembering that although the ST is derived from humble stock, its consumable parts will cost more to replace. Its larger brakes and sticky Michelin Pilot Sport tyres will be more expensive to replace when compared to other Fiesta models, while still being considered reasonably inexpensive for a performance car. 

Insurance group

The ST is the most expensive Fiesta variant to insure, sitting in group 28 out of 50, or group 30 if you buy the Performance Edition.

Warranty

As with all Fords, the Fiesta ST comes with a three-year/60,000-mile warranty as standard. This can be extended to a four-year/80,000-mile or a five-year/100,000-mile plan at a price, though it is not yet clear if prices will command a premium over the standard car. As it stands, an extension to four years is quoted as around £200 for the standard Fiesta, or £350 for a five-year plan. Roadside assistance is also included for one year.

Servicing

Customers can choose a Ford Protect Service Plan – a one-off payment plan that covers scheduled servicing, replacement vehicle hire and more. Higher-mileage drivers can opt for Ford Protect Service Plan Plus, which adds additional covered replacement parts, like shock absorbers, exhaust silencers and brake pads.

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