Nobody will build your game for you.
Look at the sound cue tutorials to figure out how to build this. You’ll want to build a sound cue that has “RPM” as input, and modulates a looping engine sound to play faster (higher pitch) if RPM is higher. Then you want your vehicle to update RPM of the cue each tick.
If you don’t know how to make a looping engine sound, you can purchase sound samples from places like soundsnap.com.