Real MPG: Audi RS3 (2015 - 2020) 2.5 TFSI 400 S tronic Sportback
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                                34.0–53.3
                            
                            Official MPG(NEDC)
                                    29.7
                                
                                Official MPG(WLTP)
22.0–32.0                            
                            Real MPG
                        
                                26.7
                            
                            Real MPGAverage
                                    61%
                                
                                of Official MPG(NEDC)
                                    90%
                                
                                of Official MPG(WLTP)
More engines available for this model:
| Engine | Official MPG (NEDC) | Official MPG (WLTP) | Real MPG Avg. | Real MPG % | |
| 2.5 TFSI 367 S tronic Sportback | 34.9 mpg | - | 26.0 mpg | 75% | |
| 2.5 TFSI 400 S tronic Saloon | 33.2–34.0 mpg | 29.7–30.1 mpg | 26.0 mpg | 87%* | 
Read the Honest John review...
Audi RS3 (2015 - 2020)
                Subtle styling. Wonderful 2.5-litre engine. Smooth and intelligent gear changes from seven-speed S tronic gearbox. Upgraded to 400PS from summer 2017.
            
        Rivals
| Audi RS3 (2015 - 2020) | 26.3 | avg mpg | 
| SEAT Leon Cupra (2014 - 2020) | 31.9 | avg mpg | 
| Subaru WRX STI (2014 - 2018) | 26.5 | avg mpg | 
| MINI John Cooper Works (2015 - 2024) | 34.1 | avg mpg | 

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