Sports car engine sounds have become a staple sound effect online because a rev instantly signals power, luxury and speed without needing dialogue. Creators lift short rev and acceleration clips for edits of real supercars, racing games, RC cars and even ordinary vehicles used as a joke. The contrast between a normal scene and an exaggerated engine roar is part of why it works in memes. Short versions like this four second clip are easy to loop, layer under music, and drop into vertical videos.