Lupo 3L bsfc Original map is from Dieselmotorentechnik 2000, expert Verlag book. not available on the internet. Stock lupo peak efficiency is point 205g/kwh @ 2250 rpm
The map with power curves is from from this study but it has been modified to simulate 0.8 liter 3 cylinder diesel.
http://e-collection.library.ethz.ch/...h-23866-02.pdf
I have multiplied those figures so 40 kW x1,125->45 kW lines.
BSFC map should not change much at low power figures and rpm as I am not needing that much power Without a turbo the 1.2 should give about 42 hp and 84Nm when comparing to 1.9 SDI specs. The 1.9 SDI can produce 15 kW at 1500 rpm -> 1.2 (T)DI no turbo action is 9,4 Kw that is much more than I am needing at 12,25 Hp at 1670 RPM without any boost at all. 1.9 SDI can produce about 20 kW at 1700RPM so 1.2 (T)DI can produce 12,6 kW.
1.9 SDI is more efficient in steady speed driving (highway cycle) than the 1.9 TDI. Making that boost wastes diesel if you are not needing it in the first place!