Alfie is an excavator and a fast worker whose motto is, "More work means more dirt; more dirt means more fun!" He loves working hard, and handles even the toughest of jobs with ease. He is painted green and has the number 12 painted on his sides and on the back of his cab.
In some examples of merchandise Alfie is depicted with freckles, although he evidently doesn't have any in the TV Series. It is unknown of what Alfie is based on, although he does resemble a 1960 K1C10 & K Excavator.