Quote:
Originally Posted by Diver
I wonder how much additional efficiency could be squeezed out of a system that turns off half the cilinders when they are not needed. Chrysler used this successfully on the Hemi.
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To put it plainly, almost none. My brother drives a 300c Hemi whenever he's in Europe, and it gets 15 mpg in mixed driving. I think he got it up to 21 or 22 on the highway once. That's what happens when you have a 5.7 liter engine. I've driven it too, and the transition from 4 to 8 cylinders is a bit jerky and noticeable. There's a delay almost akin to turbo lag. Granted this is the first model year 300c so there may have been improvements in recent years, but I doubt the system as a whole is good for anything more than 1 or 2 mpg, no matter how advanced it becomes.