159 1.9 jtdm versus 159 2.4 jtdm allrad

Hi, I wanted to hear your opinion: Is it worth a change from 159 1.9 jtdm to 2.4 jtdm with four-wheel drive? The big diesel with four-wheel drive is coming out soon and my dealer has made me at first glance quite a good offer when I change. I suspect he gets a few of the new models of Alfa pressed up and looks in advance for potential customers, because the demand for all-wheel drive in northern Germany should not be so great. On the paper, the 2.4 despite all-wheel drive is of course much more splashy than my current 1.9 – 8.6 compared to 9.8 sec. from 0 to 100. End speed 226 compared to 210 km/h. But for that the all-wheel drive should drive up the consumption. I charge 1.5 to 2 liters more at 100 km. At 30,000 km a year, that would be up to 680 euros depending on the price development. The question is, the all-wheel drive already brings more pleasure and safety, to outweigh these costs. I also ask because a friend of me recently has to return his previous Audi 4 with front wheel drive.