Daughter has that engine in her 2008, but there seems to be less soundproofing so it's not that quiet. Must say my 308 SW with the 1.6 blue HDi is the quietest diesel I have ever had.
Yes Brian, 1.6 diesel is quite quiet. But, seems to Peugeot mounted much less soundproofing materials then before. Only 2.8 kg on the firewall. However, engine is not so noticeable, but road and rolling noise can be annoying. Especially with stock Efficientgrip tyres - they are surprisingly loud.