Here is the full list of all 24 Disney Speedstorm achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Stun 50 rivals in Jungle Ruins
Use 200 Skills backwards
Win a race with any 3-Star Brawler
Win 30 Races in RANKED MULTIPLAYER
Avoid 50 attacks with a Shield
Win a race with a 3-Star Defender
Reach the Top 3 in 100 races in RANKED MULTIPLAYER
Reach a total Multiplayer Rank of 100
Use 200 Charged Skills
Collect 25 different Mottos
Win 100 Event Races
Reach Collection Level 10
Collect 150 Medals from the Maps
Collect 300 Medals from the Maps
Win a race with any 3-Star Trickster
Win 300 races
Boost for a total of 3,600 seconds
Collect 25 different Avatars
Level up a total of 200 times
Unlock 30 Crew Members
Hit 500 rivals
Collect 50 Medals from the Maps
Win a race with any 3-Star Speedster
Win a race with a level-25 Racer