Vehicle Guides
Smart MPG Guides — Real-World Fuel Economy
Real-world fuel economy and annual running costs for all 2 Smart models. Official WLTP figures adjusted for UK driving conditions — typically 12% lower than lab results.
2
Smart models
55–58
Real-world MPG range
£793
Cheapest annual fuel cost
£837
Highest annual fuel cost
All Smart models — sorted by fuel efficiency
Frequently asked questions
Which Smart is most fuel efficient?
The most fuel-efficient Smart in our database is the Smart Fortwo, achieving approximately 58 MPG in real-world UK driving conditions.
What is the cheapest Smart to run on fuel?
The cheapest Smart to run on fuel at the current UK average annual mileage of 7,400 miles costs approximately £793 per year. The most fuel-efficient variant is the Smart Fortwo.
What MPG does a Smart get in real-world driving?
Smart models achieve between 55 and 58 MPG in real-world UK driving, depending on the model and engine. Official WLTP figures are typically 12% higher than real-world results due to laboratory test conditions.
How much does it cost to fill a Smart?
Smart fuel tank sizes range from 28L to 35L depending on the model. At the current UK average petrol price of 136.8p/litre, a full tank costs between £38 and £48.
Compare with other makes
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