The engine symbolizes the dreamer’s wish to demonstrate power.
If the dreamer is the engineer this shows motivation for aggressiveness in occupational duties.
The engineer actually driving the engine (motor) reveals an emotional urge to impress another person, either male or female.
Dreams of an engine symbolize that you have the power and energy to move, manifest, go where you want to go, to do what you want to do, freedom, and that you are driven, inspired and goal oriented. Dreams of an engineer symbolize that you are driven to take control of the course of your life and making sure that you are on track with you goals. This dream may be showing you that you are being controlling and overbearing. See Energy and Train.