He started the engine and revved up (or revved it) for a few moments

زَادَ \ add to: to increase: These losses added to my troubles. increase: to become greater in size or numbers: The population of the town increases every year. put on: (the opposite of lose) to increase one’s weight or speed: My wife put on two pounds last week (she became two pounds heavier than before). put up: to raise (the price, etc.). step up: to increase: The factory stepped up production to satisfy the new demand. \ See Also جمع (جَمَعَ)، بلغ (بَلَغَ)، زاد (زَادَ)‏ \ زَادَ ثلاثة أضعاف \ treble: multiply by three: The price of coal has trebled in ten years. \ زَادَ الحَالَةَ سُوءًا \ aggravate: to make (some trouble) worse: Cold and wet weather aggravates most illnesses. \ زَادَ السُّرْعة \ push on: to hurry on. \ زَادَ سُرعَة المُحَرِّك \ rev: to increase the speed of an engine when it is not driving a machine: He started the engine and revved up (or revved it) for a few moments. \ زَادَ عن أو عَلَى \ exceed: to be more than: The crowd exceeded a thousand. \ زَادَ في \ overdo: to do too much, so that one harms the effect of one’s action: Don’t overdo your kindness. \ زَادَ من سُرْعَتِهِ \ pick up speed: to go faster. \ زَادَ وزنُه \ put on weight: (of a person) gain weight; to become heavier. \ زَادَ من \ raise: to increase; make higher: He raised the price (or his offer) from $4 to $5. She raised her voice (spoke louder). The news raised my hopes (made me more hopeful). \ زَادُه سُطُوعًا \ brighten: to make or become bright.

زَادَ سُرعَة المُحَرِّك \ rev: to increase the speed of an engine when it is not driving a machine: He started the engine and revved up (or revved it) for a few moments.