Seeking Performance Achievement
Successfully complete an R&D test
In career, every 2-3 races your engineer will say that there are new upgrades that need to be tested. When you hear this, look at your engineer (to the right) and select him. You will see an option called "R&D test". Choose to accept the task.
Out on the track, you will have a lap time to beat within a specific amount of laps. Successfully complete this task and the achievement will unlock.