Citroen C 4 Gand as petrol, which engine? Trailer use

Hello, we are just about to buy a car. We want to become a Citroen C4 Grand as a gasoline engine. Petrol engine because we almost never get more than 10,000 km per year. Now the question arises for us whether the 130 hp manual transmission will take a car or the 165 hp with automatic. Actually we wanted to get a switchcar, but now we are a little unsure if the automatic would not be better for us. To us or what we want to do with the car. We are currently 4 P No. 5 is in the planning. We want the car as a family car. It will also be our only car. For the holiday we want to make a roof box and a trailer to the car depending on how we go with the place. And with the trailer is our big question mark. If the 130 hp engine without any problems creates a trailer (no living-persons but only a simple with a tarpaulin over it in which you can outsource a few things e.g. prams). Unfortunately we could only the 130 hp mo The 130 hp have felt sufficient, but you have already noticed on the highway with 150 km/h that the car becomes more restless (it was also good wind on that day). More I would not necessarily drive by car from the driving feeling. However, since we also like to drive 180 km/h, if there is the highway, the question is now whether this with the automatic is possibly a better driving feeling. The car is mainly driven in the vicinity, where max. 100 km/h are allowed. Has someone probably driven both times (sample) and can report differences? There should be a new car with us. Thank you.