Honda wishes to further refine their 1.5 liter iDTEC engine. This additional engine sound is primarily due to the fact that the engine is made of all aluminium. It is much noisier than other diesel engines seen on various diesel models of other manufacturers in the country. These engines are fashioned out of cast iron allowing for better noise absorption and quieter sounds.
Honda Amaze diesel is noted for being a much noisier car than the Honda City diesel, due to certain corrections made where noise insulation is concerned in the latter. The upcoming Mobilio will also receive added insulation thereby making it quieter than the City while the same steps will be taken in the Jazz, all of which come in powered by the same 1.5 liter iDTEC diesel engine.
These changes will also be seen on board the Amaze facelift coming in next year wherein the compact sedan will have advantages over its present day model in the fact that interiors will be quieter. Honda is also planning to introduce sound deadening effects on its other diesel models thanks to feedback received from customers which has made the company take this step and make necessary changes.
via Autocar India