When the second-generation Smart ForTwo entered production earlier this year, its EU mileage ratings put it at the top of the heap for internal combustion engined cars by a pretty wide margin. On the EU combined cycle the diesel version was rated at 71.3 mpg (US) with CO2 emissions of only 88 g/km. The Italian magazine Quattroruote decided to see if that was achievable in the real world. They laid out a 1,000 km route consisting of highways, traffic jams, mountain roads and urban settings in Rome, Balzano and Salzburg. The bottom line is that they consumed 33 L of diesel to cover the distance, matching the official ratings.
The result: the smart fortwo cdi travelled the 1,000 km on a single tank of fuel. This corresponds to average consumption of just 3.3 litres per 100 kilometres i.e. the standard consumption. According to "Quattroruote" this makes the smart fortwo cdi the vehicle with the lowest average consumption that the magazine has ever tested in the history of its road tests.