Here is the full list of all 16 Twilight Drive achievements.
Reached the finish line of a track.
Improved on your personal best
Achieved a bronze medal
Achieved a silver medal
Achieved a gold medal
Achieved a champion medal
Set a silver medal time (or better) without steering at all
Beat the train to earn a gold medal on Tokyo train style
Achieved a bronze medal on all tracks
Achieved a silver medal on all tracks
Achieved a gold medal on all tracks
Achieved a champion medal on all tracks
Reached maximum speed - and reached the finish line
Made a video showing all your previous attempts
Changed the colour of the car from the default
Achieved a gold medal with only steering, and no attaching.