Car Stuff

What in the Name of all that’s Holy is Happening to Compression Ratios?

Okay. I knew that there were several recent(ish) engines that had outrageously high compression ratios, but I’m having trouble believing what I’m seeing. A European-spec Mazda2 with a normally-aspirated 15:1 compression ratio! FIFTEEN TO ONE! And to add to the insanity, Mazda claims that it runs on regular gas! For those of us in the

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