Bruel & Kjær, who make noise measurement equipment, have tested 14 cars on how noisy they are. Its interesting to see the A3 ranked amongst the quietest, only behind the Mercedes S-Class, Rolls Royce Ghost and Bentley Mulsanne!
In search of the world's quietest car - Brüel & Kjær
In search of the world's quietest car - Brüel & Kjær