Power Gap

[Raven]

I'm just wondering why there is a huge difference in output between japanese turbo diesels and europeans. for example: Nissan ZD30DDTI-155hp/354nm. Toyota 1KD-FTV-163hp/343nm. Mitsubishi 4M41-165hp/373nm and Isuzu 4jx1-TC- 160hp/333nm. compared to european made models of the same or near equal displacement such as BMW X5's 3.0l (2.9l actually) with 218hp/500nm and Mercedes' old ML270 with 163hp/400nm. from just 2.7L. The new Land Rover's SUV 2.7l TDI V6 has 180+hp? and 440nm of torque. Even Toyota's 1HD-FTE only has 205hp/430nm from 4.2L. What do you think?

[mazdamazda]

simple.

the jap engines that you mentioned have 4 cylinders.

while the european diesel engines that you mentioned have 6 cylinders.

[pixelparadigm]

Perhaps the Japs diesels are tuned conservatively because they're on a much more massive production process (needs to come out profitable too)?

There's a huge difference in build tolerances and quality between the models you've compared above. Although I am not saying that Japanese diesels are real suckers.

[orly_andico]

baka naman mas mataas yung boost nung Euro turbo. pag low boost, low HP
ex. mazdaspeed mp3 with 2.0L FS-DE * 6psi lang yata, di man lang umaabot sa 200hp. evo III+ 2.0L 4G63T, mas mataas yung boost, 280hp.

[knight23]

yung bagong nissan pathfinder 2.5L diesel has 172hp and 403 Nm. rhe 1kd-ftv sa europe has 166hp and 410Nm. even the honda's new 2.2L diesel has 140hp and 340Nm which is still low compared to the 2.0L diesel of the bmw which has 163hp and 340Nm.

maybe because the japanese manufactures are catering to a more global market and most non-european countries have poorer diesel quality thus they cannot push more performance w/o suffering the reliability.

[yebo]

imho, europeans change their cars more often than asians. so since asians use their cars for years longer then cars need to be more reliable (by lowering the rated output power).

[vinj]

There are a lot of factors as mentioned but i think reliability (fuel quality considerations, parts, service, etc...) and cost-efficiency is the issue as the other put it.

Also, in the case of the Toyota 4.2L which is similar to the 160hp version we have locally with the LC80/LC100 (AFAIK), i think the addition of an intercooler and (maybe EFI) added to the HP jump.

Europe also gets the first crack at the new engine technology also so expect those HP numbers to trickle down to countries like ours in a few years or so.

[mbt]

the number of cylinders does much less for power output than displacement. in fact, i'd think that there would be more power losses in an engine with more parts (cylinders) than one with less