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Message: [QUOTE="SpartanDieselTech, post: 1347577, member: 22311"] This is about the best comparison I've read so far. Lined up side-by-side in a boosted launch, the 2015/2016 6.7 will outrun the 6.4L to 60 or so, and the 6.4 runs a bit stronger from 60 to 100. All in all I believe they turn very similar 1/4 mile times. As far as spooling and response- keep in mind that the 6.7L is running a turbo pretty close in size to the 6.4L low pressure charger, and has to spool it without the assistance from a second unit. This does mean, as described above, it isn't as "snappy" in feel. Also, as noted above, some of the lack of response is electronics. We can reduce that (and are playing around with it) but in doing so, it will reduce some of the smoothness and induce touchy throttle, as with the 6.4. For most users, I don't see it being worth the trade-off. When it comes down to it, both a late model 6.7 and a 6.4 will make almost identical power. The 6.7 has about a 200ft/lb edge in torque, and the 6.4L has a powerband that's 300 to 350 rpm longer. Hence why, despite the difference in feel, they perform so similar. [/QUOTE]

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