2021 Fiat 500X — Full Specifications
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Running gear matters most — before anything else, UK: check tyre prices at TirendoUS: check wheel & tyre prices at WheelHero for this car's fitment.
The 2021 Fiat 500X is an SUV powered by a 1.3L 4-cyl turbo regular gasoline engine. It returns around 31 mpg (UK) / 26 mpg (US EPA) combined. Owners often keep a Fiat 500X workshop manual to hand for servicing and repairs.
Compared with the 2020 Fiat 500X: Fuel economy is essentially unchanged at around 31 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 1.3L 4-cyl turbo |
|---|---|
| Transmission | Automatic 9-spd |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | SUV |
| Width | 1796 mm |
| Fuel Economy (UK) | 31 combined / 29 urban / 36 extra-urban mpg |
| Fuel Economy (US EPA) | 26 combined / 24 city / 30 highway mpg |
| CO₂ Emissions | 221 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,600 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 1 configuration for the 2021 Fiat 500X, all with the 1.3L 4-cyl turbo engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 1.3L 4-cyl turbo | Automatic 9-spd | All-Wheel Drive | 31 | 26 (24/30) | 221 | $2,600 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2021 Fiat 500X
Running Costs: 2021 Fiat 500X
Covering around 8,000 miles a year in a 2021 Fiat 500X at 31 mpg combined, expect roughly 1,173 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,600 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2021 Fiat 500X Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
How does the Fiat 500X compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 31 mpg figure is 4 mpg better than that average. Its 221 g/km CO₂ figure is 32 g/km lower than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
Fiat models in our database average about 35 mpg (UK) combined on their most efficient configuration; the 2021 Fiat 500X's 31 mpg is 4 mpg below that make average. Its 221 g/km CO₂ figure is 26 g/km higher than the 195 g/km Fiat average.
Of the 8 Fiat 500X model years we cover, the 2021 ranks 4th for combined fuel economy on its best configuration (31 mpg UK combined, against a high of 34 mpg). See every Fiat 500X year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2021 Fiat 500X
Frequently Asked Questions
What engine does the 2021 Fiat 500X have?
It's fitted with a 1.3L 4-cyl turbo regular gasoline engine, paired with a automatic 9-spd transmission.
What is the fuel economy of the 2021 Fiat 500X?
The most efficient configuration returns around 31 mpg (UK) combined, or 26 mpg on the US EPA cycle.
How much does the 2021 Fiat 500X cost to fuel per year?
The US EPA estimates about $2,600 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Is the Fiat 500X's fuel economy good for an SUV?
Yes — it returns around 31 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track, making it one of the more efficient options in its class.