Dave is a dark brown diesel. Ever since he saw Diesel 10 be mean to a little engine, he likes steam engines. However, he can be cheeky. He strives to be Really Useful and encourages everyone else to.be the same. Dave is a BR Class 08 Diesel Shunter. His number is D22.
- Season 1 - Dave the Diesel, A New Branch Line, Flora's New Coach, Sidney Helps Out (cameo), and The Old Recipe
- Season 2 - Stinky Cheese and Dares
- Season 4 - Dave's Scary Tale
- Season 5 - Brandon's Boss (does not speak), Gordon Gets Crushed (does not speak), Diesel and the Famous Visitors (does not speak), The Fastest Engine in the Hills, Thomas Gets Juiced (cameo), and Thomas Runs Away
- Season 6 - The Wrong Sort of Coal (does not speak)