* Modifications: Many cars are modified to be louder than their stock versions. Exhaust systems, intake systems, and even the tires can all contribute to noise levels.
* Measurement methods: Different measurement methods will yield different results.
* Legal restrictions: Laws regarding vehicle noise levels vary significantly by location. Cars that are legal in one place might be illegal in another.
While specific individuals might hold local or informal records for the loudest car, there's no official, globally recognized competition or record-keeping for this. You'll find many claims online, but verifying them is difficult.
