Acura Announces Clean Diesel Engine for 2009

Honda have been offering Diesel powered cars in the UK for some time.

the i-VTEC turbo engine can't turns with diesel. power at 6000 rpm is impossible with diesel (max: 4000 rpm)

Acura and Honda are a realy special companies ...

Gabriel: Strange tha the BMW 123d has 204hp @ 4400rpm, I'm sure it revs another hundred more.

sure diesel engine offers the best fuel consumption, but the limited rev is still annoying for sport car

Go Honda/Acura! The Diesel Engine's lack of high engine speed capability can be easily compensated for with the right gearing kids... But I can agree nothing can compare with the soul-awakening shreik of an H22A, K20A, or F20C @ 7000-9000 RPM

honda, if no other auto. company, may be able to engineer an ultra high-revving, high compression clean diesel engine. I wonder if this could ever compare to a DOHC VTEC gas motor, could it ever come close in driving feel, sound, or provoke as much joy??

What is all this "high revving motor" garbage. Go test drive a VW 2.0T or BMW 335 with gobs of torque across a power plateau that starts at 1700 RPMs. Peaky, high revving engines are for noise and boy-racer graphics.

I think the rpm is limited by the injection pressure, if they are able to surpass the Audi TDI which has a pressure of 2000psig and revs to 6000rpm im sure they get some decent performance and joyfull driving characteristics.

benzman: you are ignorant if you speak without knowing of what you speak.. definitely not peaky go drive a honda/acura with JDM 2.2 DOHC VTEC the torque band is very linear, believe it or not, it is very similar to a BMW I6 from the M3, YES, the M3 in a car weighing 2300-2600 lbs you would be amazed at the driving experience

yes maybe not as refined but thats for women and old people... and benzman i am not just a honda freak.. It's that I am just not shallow... (as far as judging automobiles by brand name) My family owns vehicles from Volkswagen, Mercedes-Benz AMG, Porsche, Audi, BMW, I just have owned honda cars and know they have made some good vehicles and amazing engines... open your eyes and ears..

nickkop: I'm not a label whore, I named VW and BMW because there specific engines stand out. What is your definition of an amazing engine? I agree that Honda makes efficient, durable, reliable, light, free-revving engines. However, those are not the traits that make a dynamically outstanding powerplant. You want your torque band as low and usable as possible without overcoming available traction. Providing said torque on a plateau from almost off idle through 65% of the engine speed range (as these German motors do) is dynamically superior to catching a small(low displacement) torque peak after 70% of the engine speed range. The power is much more usable. And any comparison of a FWD car to an M3 is voided by the fact that the front wheels can't do everything...

What amazing in this engine is clean emission clearing EPA Tier II Bin 5 without using urea unlike most of German diesel engines which use stored urea named Bluetech, meaning you don't have to fill the urea separately from fuel. And of course as the nature of diesel, it is about 20% better in fuel consumption than petrol engine. Higher revving is fun, but what is priortized for this engine are good fuel efficiency and clean emission through a simple technical solution. Fun to rev is the next priority.

Diesels are limited in RPM by the fact that they are long stroke. Since diesels use compression ignition and not a spark plug, they need a high compression ratio. Thus a longer connecting rod is employed. This adds mass, and since the stresses in the connecting rod are dominated by those created by inertia (read: heavier + quick change of direction = bad) diesels must run at lower speeds.