To get this achievement do the following:
* Go to Grand Prix (Solo) mode
* Select any car you like
* Choose any track, Monza will be the easiest
* ! Make sure you set the race distance to 25%
* ! Put AI Level between 101&110
* ! Turn off Safety Car and Rules and Flags
* ! You will need to make atleast 1 pit-stop and choose different tyres then you started on.
You could combine this achievement with the following one:
The Monaco Victor achievement in F1 2019 worth 35 pointsWin a 25% distance (or longer) F1 race at Monaco (any difficulty)
With Rules and Flags turned off you can just go straight through turn 1, while the AI will take the racing line. This way you get a big boost against the AI-drivers. Then you will only need to finish the 13 Lap race and the achievement is yours.