Sorry, yes, it is Grand Prix II. The second part is equally correct, I cd to gp2 folder and then type GP2.EXE on dosbox

Mounted the dir where gp2 folder is located. I then move to there and execute gp2.exe. The result is: DOSBox switched to max cycles, because of the setting: cycles=auto. If the game runs too fast try a fixed cycles amount in DOSBox's options. and a black window where I can read Cpu speed: max 100% …