2018 MINI John Cooper Works Convertible — Full Specifications
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The 2018 MINI John Cooper Works Convertible is a coupe powered by a 2L 4-cyl turbo premium gasoline engine. Its most fuel-efficient configuration returns around 34 mpg (UK) / 28 mpg (US EPA) combined, with 30–34 mpg (UK) across all configurations. Owners often keep a MINI John Cooper Works Convertible workshop manual to hand for servicing and repairs.
Compared with the 2017 MINI John Cooper Works Convertible: Fuel economy improves from 32 to 34 mpg (UK) combined on the most efficient configuration. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 2L 4-cyl turbo |
|---|---|
| Transmission | Automatic (S6) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Coupe |
| Passenger Volume (EPA) | 76 cu ft (2,152 L) |
| Luggage Volume (EPA) | 5 cu ft (142 L) |
| Fuel Economy (UK) | 34 combined / 30 urban / 40 extra-urban mpg |
| Fuel Economy (US EPA) | 28 combined / 25 city / 33 highway mpg |
| CO₂ Emissions | 196 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,950 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2018 MINI John Cooper Works Convertible, all with the 2L 4-cyl turbo engine. Combined fuel economy ranges from 25 to 28 mpg (US), or 30 to 34 mpg (UK), depending on engine, transmission and drive. 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 |
|---|---|---|---|---|---|---|
| 2L 4-cyl turbo | Automatic (S6) | Front-Wheel Drive | 34 | 28 (25/33) | 196 | $2,950 |
| 2L 4-cyl turbo | Manual 6-spd | Front-Wheel Drive | 30 | 25 (22/31) | 217 | $3,300 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 76 cubic feet (about 2,152 litres) and luggage volume at 5 cubic feet (about 142 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2018 MINI John Cooper Works Convertible
Running Costs: 2018 MINI John Cooper Works Convertible
Covering around 8,000 miles a year in a 2018 MINI John Cooper Works Convertible at 34 mpg combined, expect roughly 1,070 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,950 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.
Only need this car occasionally? See our buy vs rent comparison.
2018 MINI John Cooper Works Convertible 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 MINI John Cooper Works Convertible compare to similar coupes? For context, coupes in our database average around 25 mpg (UK) combined — this model's 34 mpg figure is 9 mpg better than that average. Its 196 g/km CO₂ figure is 82 g/km lower than the 278 g/km average for coupes on this site. This comparison is based on 1072 coupes in our dataset.
At 34 mpg (UK) combined it sits close to the 34 mpg average for MINI models in our database.
Of the 14 MINI John Cooper Works Convertible model years we cover, the 2018 ranks 4th for combined fuel economy on its best configuration (34 mpg UK combined, against a high of 35 mpg). See every MINI John Cooper Works Convertible 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 2018 MINI John Cooper Works Convertible
Frequently Asked Questions
What engine does the 2018 MINI John Cooper Works Convertible have?
It's fitted with a 2L 4-cyl turbo premium gasoline engine, paired with a automatic (s6) transmission.
What is the fuel economy of the 2018 MINI John Cooper Works Convertible?
The most efficient configuration returns around 34 mpg (UK) combined, or 28 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 30 to 34 mpg.
How much does the 2018 MINI John Cooper Works Convertible cost to fuel per year?
The US EPA estimates about $2,950 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.
How much interior and luggage space does the 2018 MINI John Cooper Works Convertible have?
EPA measures interior passenger volume at 76 cubic feet (about 2,152 litres) and luggage volume at 5 cubic feet (about 142 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the MINI John Cooper Works Convertible's fuel economy good for a coupe?
Yes — it returns around 34 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the coupes we track, making it one of the more efficient options in its class.