European type certification rules set a noise limit of 72 dB(A) for new passenger cars. This will reduce to 68 dB(A) by 2026. [1] It’s also illegal to modify a

European type certification rules set a noise limit of 72 dB(A) for new passenger cars. This will reduce to 68 dB(A) by 2026. [1] It’s also illegal to modify a car exhaust system in such a way that makes it louder than stock, however in practice it seems there is very limited enforcement of this. Motorcycles are allowed to emit far higher noise levels than cars, unfortunately! [1] https://www.vehicle-certification-agency.gov.uk/fuel-consumption-co2/fuel-consumption-guide/cars-and-noise/#topic-title https://www.vehicle-certification-agency.gov.uk/fuel-consump...