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