Real MPG: Smart Forfour (2004 - 2006)
Funky-looking, versatile hatch with plenty of safety kit. Manual versions drive well. Four stars for the diesels, by far the best in the line-up.
Slow gearshifts with the semi-auto. Not all second-hand ones will have a three-point seatbelt for the middle rear seat. Could have been a contender but arrived two years too late.
Select engine for more Real MPG information:
| Engine | Official MPG (NEDC) | Official MPG (WLTP) | Real MPG Avg. | Real MPG % | |
| 1.0 | 50.4–52.3 mpg | - | 42.8 mpg | 83% | |
| 1.1 | 49.6 mpg | - | 44.0 mpg | 89% | |
| 1.3 | 47.1 mpg | - | 48.1 mpg | 102% | |
| 1.5 | 47.9 mpg | - | 41.0 mpg | 86% | |
| 1.5 CDI 68 | 58.8 mpg | - | 60.3 mpg | 103% | |
| 1.5 CDI 95 | 58.8 mpg | - | 58.9 mpg | 100% | |
| Brabus | 41.5 mpg | - | 33.3 mpg | 80% |
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Smart Forfour (2004 - 2006)
Funky-looking, versatile hatch with plenty of safety kit. Manual versions drive well. Four stars for the diesels, by far the best in the line-up.
Rivals
| Smart Forfour (2004 - 2006) | 46.7 | avg mpg |
| BMW 1 Series (2004 - 2011) | 41.6 | avg mpg |
| Audi A3 Sportback (2004 - 2012) | 44.7 | avg mpg |
| Suzuki Swift (2005 - 2010) | 42.4 | avg mpg |
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