Diesel believes that Steamies are no match for Diesels. Oily, scheming and ever ready to stir up trouble in the shed, Diesel's characteristic smirk is a sure sign that some Steamie, somewhere is in for a bit of trouble. However, given a chance, Diesel wants to show that he's a Really Useful Engine too!
Diesel has shunted more freight cars in one day than any other diesel. He is based on a British Rail Class 08 Diesel-Electric Shunter.