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Originally Posted by nbalthaser
this is an unfair statement. there is no evidence that ima is inferior to hsd. taking into account cost/complexity and results, we see that ima is less costly, less complex and delivers relatively the same mpg results as hsd.
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Not in my experience, and not in the experience of anyone I know who has driven both vehicles. I get 7-8 mpg better in a Prius than a HCH, Consumer Reports got 7 mpg better, every publication I've read gets better results in a Prius than a HCH, and "xcel", who has achieved up to 70 mpg using extreme hypermiling techniques in a HCH, got 100+ mpg when doing the same in a Prius.
Now the HCH does have strengths over the Prius, which is why I bought it, but the IMA delivers neither the performance nor the economy of HSD.