2015 BMW M6 Convertible — Full Specifications
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The 2015 BMW M6 Convertible is a coupe powered by a 4.4L 8-cyl turbo premium gasoline engine. Its most fuel-efficient configuration returns around 20 mpg (UK) / 17 mpg (US EPA) combined, with 19–20 mpg (UK) across all configurations. Owners often keep a BMW M6 Convertible workshop manual to hand for servicing and repairs.
Compared with the 2014 BMW M6 Convertible: Fuel economy is essentially unchanged at around 20 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 4.4L 8-cyl turbo |
|---|---|
| Transmission | Manual 6-spd |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Coupe |
| Passenger Volume (EPA) | 88 cu ft (2,492 L) |
| Luggage Volume (EPA) | 11 cu ft (311 L) |
| Fuel Economy (UK) | 20 combined / 18 urban / 26 extra-urban mpg |
| Fuel Economy (US EPA) | 17 combined / 15 city / 22 highway mpg |
| CO₂ Emissions | 321 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $4,850 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2015 BMW M6 Convertible, all with the 4.4L 8-cyl turbo engine. Combined fuel economy ranges from 16 to 17 mpg (US), or 19 to 20 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 |
|---|---|---|---|---|---|---|
| 4.4L 8-cyl turbo | Automatic (AM-S7) | Rear-Wheel Drive | 19 | 16 (14/20) | 344 | $5,150 |
| 4.4L 8-cyl turbo | Manual 6-spd | Rear-Wheel Drive | 20 | 17 (15/22) | 321 | $4,850 |
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 88 cubic feet (about 2,492 litres) and luggage volume at 11 cubic feet (about 311 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2015 BMW M6 Convertible
Running Costs: 2015 BMW M6 Convertible
Covering around 8,000 miles a year in a 2015 BMW M6 Convertible at 20 mpg combined, expect roughly 1,818 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $4,850 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.
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2015 BMW M6 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 BMW M6 Convertible compare to similar coupes? For context, coupes in our database average around 25 mpg (UK) combined — this model's 20 mpg figure is 5 mpg below that average. Its 321 g/km CO₂ figure is 43 g/km higher than the 278 g/km average for coupes on this site. This comparison is based on 1072 coupes in our dataset.
BMW models in our database average about 28 mpg (UK) combined on their most efficient configuration; the 2015 BMW M6 Convertible's 20 mpg is 8 mpg below that make average. Its 321 g/km CO₂ figure is 81 g/km higher than the 240 g/km BMW average.
Of the 8 BMW M6 Convertible model years we cover, the 2015 is the most economical on its best configuration (20 mpg UK combined). See every BMW M6 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.
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Frequently Asked Questions
What engine does the 2015 BMW M6 Convertible have?
It's fitted with a 4.4L 8-cyl turbo premium gasoline engine, paired with a manual 6-spd transmission.
What is the fuel economy of the 2015 BMW M6 Convertible?
The most efficient configuration returns around 20 mpg (UK) combined, or 17 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 19 to 20 mpg.
How much does the 2015 BMW M6 Convertible cost to fuel per year?
The US EPA estimates about $4,850 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 2015 BMW M6 Convertible have?
EPA measures interior passenger volume at 88 cubic feet (about 2,492 litres) and luggage volume at 11 cubic feet (about 311 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the BMW M6 Convertible's fuel economy good for a coupe?
It returns around 20 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the coupes we track.