Originally Posted By: asiancivicmaniac
Originally Posted By: gofast182
Originally Posted By: badtlc
Originally Posted By: gofast182
If one looks at dyno plots, instrumented tests, and real-world efficiency numbers one will find that SkyActiv engines are good but not great. Honda's Earth Dreams K24W spanks it in power while delivering the same real-world efficiency.
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Based on what? I see a 40 MPG rated Mazda6, but I don't see anything close to a 40 MPG rated Accord. What are you trying reference?
As for power, I can find 185-190 HP for the K23W# vs 185 HP for the Mazda 2.5L.
I'm referencing a set of dyno plots I've seen, instrumented acceleration tests, and reviews where people cite real-world MPG. Despite the spec. sheet power ratings the K24W comes out more true to that on the dyno, has quicker acceleration, and is right there with it in observed MPG.
If the Motor Trend tests mean anything, the 6 is actually tenths of a second faster than the Accord in the 0-60.
The auto skyactiv is only quicker over the 0-30 interval because the mazda allows brake torquing and wheelspin for an optimal launch. After that, the Accord's power/weight ratio kills it over every other interval. Kudos to Mazda for allowing a good launch, but the Accord engine is clearly much stronger.
In Motor Trend, you can easily see the advantage the 6 got from its launch in the 0-30mph result - 2.5 seconds. The Accord is quite a bit behind at 2.9 seconds.
However, the Accord is already faster to 70mph and anything above. Also the 1/4 mile trap speed shows that the Accord has more power. The 45-65mph time is also a good indication of power as launching is taken out of the equation.
In C/D, the difference between the two cars from 0-30mph is even bigger, 2.5 seconds vs 3.1 seconds. However, the Accord gets to 100mph faster, despite falling behind hard initially. May be this is easier to see: The 6 takes 17.5 seconds to go from 30mph to 100 mph (20s - 2.5s). The Accord takes 16.2s to ho from 30-100mph (19.3s - 3.1s). Top gear acceleration comparison is irrelevant since the CVT's artificial 7th gear is set at 37.1mph/1000rpm, while the 6's 6th speed gear ratio is at 33.7mph/100rpm.
Now, if one takes the auto transmission out of the equation (since they're different types) and goes for a comparison of manuals the 6 takes 7.9s to go from 0-60, 20s to go from 0-100, and 16.1s to cover the quarter mile. The Accord takes 6.6s to go from 0-60, 17.9s to go from 0-100, and 15.3s to cover the quarter mile.
It's plain to see that the K24W is a more robust engine especially when the transmission variable is factored out of the equation. Then if you couple that with the fuel economy numbers folks are reporting (real-world) they're really close to the 6. I really don't mean this to be a [censored] contest because I happen to like the new 6 but there are certain facts out there which indicate the SkyActiv engine, while quite good, isn't a clear leader.