| Subject | English | Spanish |
| transp., avia. | all-engines long range cruising speed | velocidad de crucero de largo alcance con todos los motores operativos |
| tech. | engine operation speed | velocidad de funcionamiento del motor |
| transp., mech.eng. | engine speed | revoluciones por minuto del motor |
| transp., mech.eng. | engine speed | régimen del motor |
| transp. | engine speed | regimen del motor |
| auto. | engine speed | velocidad del motor |
| mech.eng. | engine speed governor | mando de velocidad de motor |
| mech.eng. | engine speed governor | control de aceleración |
| agric. | engine speed p.t.o. | toma de fuerza del cambio de velocidades |
| tech. | governed engine speed | velocidad regulada de motor |
| mech.eng. | high-speed engine | motor rápido |
| mech.eng. | idling speed of an engine | velocidad de marcha en vacío de un motor |
| transp. | medium-speed diesel engine | motor Diesel medium-speed |
| transp., mil., grnd.forc., mech.eng. | no load engine speed | velocidad de ralentí |
| transp., mil., grnd.forc., mech.eng. | no load engine speed | velocidad en vacío |
| transp., mil., grnd.forc., mech.eng. | no load engine speed | régimen en vacío |
| transp., avia. | one-engine-inoperative cruise speed | velocidad de crucero con un motor sin funcionar |
| mech.eng. | optimum engine speed | velocidad óptima del motor |
| mech.eng. | optimum engine speed | régimen óptimo del motor |
| tech. | rated-engine speed | velocidad régimen nominal de un motor |
| gen. | speed governors for machines, engines and motors | reguladores de velocidad de máquinas y de motores |
| gen. | speed governors for machines, engines and motors | reguladores de velocidad de motores |
| mech.eng. | to speed up an engine | embalar un motor |