When I was growing up I remember "Landau Tops" were a thing. Basically it was vinyl put on a roof for "style."



I've learned that a number of high-end cars, mostly German, have "active sounds design"

Basically your car's speakers and audio system "enhance" the engine noise. From Wikipedia:

Active sound design (ASD) is an automotive audio application in which the car engine's sound is generated based on various engine parameters like speed and throttle input. This technology is implemented in "

• BMW M2, M3, M4 and M5
  
• Renault Clio
  
• Ford Focus ST
  
• Audi SQ5
  
• VW diesels (to make it sound like a petrol engine)
  
• Skoda Octavia vRS
  

It's the opposite of "active nose control" because it actually makes the interior of the car noisier. How stupid is that: pay big money for a quiet car, but have the audio system pipe in fake engine noise.

Someone went to the trouble of hacking the module to make a BWM sound like a Rolls Royce Ghost.

https://www.digitaltrends.com/cars/bmws-sound-design-system-hacked-video/

Here's a NZD $2,000 after-market kit to add a fake V8 sound to a Ford Mustang VI. Again you the people inside the car will hear the fake V8, even with fake misfires.



https://www.active-sound.eu/it/ford/mustang/mustang-vi/complete-kit-active-sound-with-soundbooster-and-app-control-ford-mustang-vi

At least the Renault Clio let you choose the fake engine noise, including a past 1969 Renault Godini, a 1971 motorcycle and future 2038 model.