200hp and 400Nm need fuel ...
In my opinion, every chip tuning if diesel vehicles in Europe is towards more power and not economy.
An economy tuning world work only on WG operating and not on fuel delivery but will not be selling because there is no market for it.
Seeing how large and heavy your vehicle is, and how picky our regulations are, I'd be happy with 5,5 L/100 kms.
That's my average with a Mk2 Megane Estate 1,9L DCi
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