Three engine types were planned, the DB 603M with , the DB 603N with or the Jumo 213E, designed from the start to have the same fluid service locations as the DB 603, with . The 603M and 213E both supplied using MW-50 water injection. Performance with the 603N was projected to be , in the same class as the Messerschmitt Me 262 pioneering jet fighter then entering service testing, which would have stood as a record for many years, even against specialist racing machines. Performance would still be excellent even with the far more likely -output and above class aviation piston engines, which eventually proved to be a severe technological barrier for the German aero-engine industry during the war years. The 603M was projected to give it the high speed of .