Think why it hasn't been introduced on any production car to date.....
The data I have for a Mito with a 135Bhp multiair engine is 7.4l/100km, which is 0.1l better than the Punto illustrated with 30 Bhp more power. Why is this then?
A Punto 105 Multiair kerb weight - 1075kg Yaris - 1010Kg. The Yaris is 6% lighter than the Punto so not exactly a fair comparison.
The reason why the Multiair engine is up for so many awards isn't for the single NA derivative but for the performance/efficiency capabilities of the two turbo charged variants. Find another engine with that kind of power at that capacity with those economy/emissions figures.
Is it just a coincindence the the Pattakon site and yourself are based in Greece?
In the comparative tests (the same journalist drives one by one all cars and tries his best) the Punto is slower than the Yaris. Punto prevails only in the maximum speed.
In the specifications given by the manufacturer, the figures are as you write: Punto is 1 second faster than Yaris at 0-62 mph.
The weight difference (Punto / Yaris) is small to justify the extreme difference in urban cycle consumption (6.2 vs 7.5 lt / 100 Km, i.e 20% worse).
In case you still think the weight causes the difference,
the same weight (1088 Kp) and power (105 bhp) VW Polo TSi (0-100 Km/h at 9.7 sec, 124 gr CO2 / Km at combined cycle, 6.8 lt/100 Km urban cycle) shows, just like the Yaris, that the MultiAir is not doing well at partial loads / low revs.
Both, Yaris and Polo, are more or less conventional engines while Punto is the high tech.
The MultiAir turbo versions (Giulietta 170 bhp, Mito MultiAir 170 bhp and 135 bhp, Punto 135 bhp) more or less keep the emissions / fuel-consumption figures of the 105 bhp naturally aspirating MultiAir Punto, increasing by far the power output and the torque.
Today no other carmaker offers such a combination of power output, mileage and emissions (170 bhp peak power, 5.8 lt / 100 Km combined consumption, 134 gr CO2/Km combined cycle for the 1355 Kp heavy Giulietta).
Yet, the good can be better.
And it is not a coincidence that both, me and pattakon, are from Greece.