A4 1.8T power/consumption

Hello, I drive an A4 1.8T Avant with automatic. Built 97, top speed with tailwind: 205 0 to 100: 13.5 sec, average consumption never under 10 liters, even when driving overland. According to the user manual, the values are much better (even with automatic). Now the question is whether anything is wrong or whether the normal product dispersion is. Does anyone have experience with such a car?