<page_title> Mercedes-Benz OM 138 </page_title> <section_title> Technical data </section_title> <table> <cell> Bore × Stroke <col_header>  </col_header> <col_header> Configuration </col_header> <col_header> Engine type </col_header> <col_header> Fuel system </col_header> <col_header> Valvetrain </col_header> </cell> <cell> 90 mm × 100 mm (3.54 in × 3.94 in) <col_header> OM 138 </col_header> <row_header> Bore × Stroke </row_header> </cell> <cell> Rated rotational speed <col_header>  </col_header> <col_header> Configuration </col_header> <col_header> Engine type </col_header> <col_header> Fuel system </col_header> <col_header> Valvetrain </col_header> <col_header> Bore × Stroke </col_header> <col_header> Displacement </col_header> </cell> <cell> car engines: 3000 rpm truck engines: 2800 rpm <col_header> OM 138 </col_header> <row_header> Rated rotational speed </row_header> </cell> </table>
The bore and the stroke is 90 mm × 100 mm (3.54 in × 3.94 in), this gives the OM 138 a rotational speed of 3000 rpm and 2800 rpm as a truck engine.