If you need a car engine sound, buzz into a brass mouthpiece – (tuba/baritone) or bassoon reeds – and pitch shift it down.
If you need actual car recordings, here’s a selection of car sound effect libraries.
This library features a wide range of recordings from various museums and galleries, each differentiated by the nuances of their size and space. All recordings feature pristine echos, walla and movement. The library includes: