Differences in consumption 2.0 TDI Tiguan and Alhambra 7N, what is it?

Good morning Together, for a while the too high fuel consumption at our 2.0 TDI DSG 150 PS Ecomotive mj. 19. This is in practice like a petrol engine, between 7 and 8 liters although we live in the countryside, the part is rarely on traffic lights and I drive like a walking dune with it, my wife rather normal. Friends think, yes would be normal heavy car etc, but these are other models as well. I had a Tiguan with the 150 hp TD last autumn. I and 7 gear DSG as a rental car. See there: Without taking any consideration of the consumption, often full load, the consumption long distance highway approx. 6L and if you want also on short distances on 6L. Above all the consumption did not go so extremely high when climbing or accelerating. And:, The Tiguan was here still in the drive-in phase, where the consumption is indeed higher. I wonder why that is. We have a butter and bread Alhambra, the Tiguan was almost fully equipped thereby be The factory data are not far apart either. Were there such strong improvements between Mj19 and 22 which produce about 25 to 30% lower consumption in reality, how differ the engines technically than? The pure weight is only perhaps 5 to 7% difference. I would have been interested, because the consumption with a constantly more expensive diesel price makes the small diesel practically meaningless and all that I would like to follow Maybe someone knows what. Best regards from Baden-Württemberg