Engine type classification All the engines dealt with here are related in terms of their design and make up a family. The type classification, which is made up of a series of letters and numbers, reveals some of the features of the engine in question provided the reader is familiar with the underlying nomenclature. The system is explained below using the model type D 2876 LE 401 as an example: D The “D” at the start of the type classification stands for “Diesel” 28 The numbers “28” indicates that the power plant in question has a bore of 1 28 mm 7 The “7” means 166 mm stroke 6 The “6” shows that the engine has 6 cylinders 6. L This letter stands for “charge−air cooling” (German:
Ladeluftkьhlung) E The “E” stands for “fitted engine” (German: Einbaumotor) and is intended to distinguish MAN ve- hicle engines 401/2.. This is a Works internal development number. 6