Here is the full list of all 14 Roadclub: League Racing achievements.
Go really fast
Don't leave a scratch
Lose first place and win a race coming back from last place
Fully upgrade a car in career
Max upgrade power of a car in career
Get promoted
Consistently dominate the club
Don't bump any opponents for a whole race
Win a race against 5 opponents
Your career begins
Become the next Roadclub Master
Save enough cash
Win a league race with an RWD car
Eliminate an opponent and win any race