Here is the full list of all 23 Turbo Dismount achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Do a successful barrel roll and landing.
Perform 1000 decapitations.
Complete 100 dismounts with the Pink Lightning.
Totally demolish all vehicles (that can be demolished).
Cross the finish line on Skid Marks at 88mph.
Nail it 100 times.
Cut down 100 trees.
Launch three consecutive dismounts at max velocity.
Do ten strikes with the Bowling Pins.
Launch 1000 dismounts.
Detonate ten mines in a single dismount on Run DMZ.
Reach a record time on Skid Marks.
Try everything once.
Pull ten somersaults in a single dismount.
Drive through 1000 turbo pads.
Fully obliterate Mr. Dismount.
Reach a height of 1000ft (305m) in Space Program.
Get hit by five different NPC vehicles in T-Junction.
Totally demolish a single vehicle.
Customize Mr. Dismount or a vehicle.
Play a Steam Workshop level.
View a replay in slow motion.
Lose only a single limb during a single dismount.