Real MPG: Peugeot 308 CC (2009 - 2015) 1.6 THP Automatic
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                                36.6
                            
                            Official MPG(NEDC)
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                            Real MPG
                        
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                            Real MPGAverage
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                                of Official MPG(NEDC)
More engines available for this model:
| Engine | Official MPG (NEDC) | Official MPG (WLTP) | Real MPG Avg. | Real MPG % | |
| 1.6 e-HDi | 57.5–60.1 mpg | - | 50.4 mpg | 86% | |
| 1.6 HDi 110 | 55.4 mpg | - | 49.1 mpg | 89% | |
| 1.6 HDi 112 | 55.4 mpg | - | 48.0 mpg | 87% | |
| 1.6 THP | 37.7–40.4 mpg | - | 36.5 mpg | 94% | |
| 1.6 THP 200 | 40.4 mpg | - | - | - | |
| 1.6 VTi | 40.1–42.2 mpg | - | 39.4 mpg | 96% | |
| 2.0 HDi | 47.8–49.6 mpg | - | 46.7 mpg | 96% | |
| 2.0 HDi Automatic | 42.8 mpg | - | - | - | 
Read the Honest John review...
Peugeot 308 CC (2009 - 2015)
                Much improved over 307CC. Reasonable range of engines and transmissions.
            
        Rivals
| Peugeot 308 CC (2009 - 2015) | 42.4 | avg mpg | 
| BMW Z4 (2009 - 2016) | 32.3 | avg mpg | 
| Audi A3 Cabriolet (2008 - 2013) | 43.1 | avg mpg | 
| Audi A5 Cabriolet (2009 - 2017) | 34.4 | avg mpg | 

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