If you want to spend less and go for a 25hp it will perform like other aluminium boats that have a max.off 25hp. I think it will run around 30kmh maybe a bit more or less.

I like the boat very much,for this price it is the best boat on the market i think but it need some work as you see in the video. Its very stable 2 persons on one side is like nothing happens. 40hp will take you to 50kmh less hp is less speed. The boat go flat at 20kmh in 2sec then then you fly off in 1sec to top speed with a biggest Spitfire prop. With a fuel consumption of 100km 30l full throttle,less speed less fuel ofcourse. I think the 40hp give the best preformance,my experience with previous boats is max. hp drive best because it is engineerd for the max hp. I hope you have enough information,if you want to learn more jusk ask.