Corolla Verso D-Cat

Hello, everyone. I have a concern, because of the increasing family members I have to sell my BMW 520d ( 136 hp) and buy a van. Today I had the opportunity to get to know a Verso D-Cat. To be honest, I was very scared about the loud engine, I have always heard and read that this car should have very quiet inside noise, here is the question, is it because of the noise insulation? Which engines do people compare when they claim that it is very quiet? Isn’t it correct to compare this with BMW, which is already 5 years old and has less hp? How are the experiences with engine noise? Before the BMW I had Avensis D4D, I have the feeling that nothing has become quieter, or am I mistaken? Thank you already in advance!