By on March 15, 2016

1991 Mazda MX-3, Image: Mazda

Reader Brian Tai writes:

I’ve been an enthusiast and part-time DIYer for years now. I love to learn about everything automotive.

My question for you: why are cars with small engines always inline-fours? Why do manufacturers not put 2.0-liter V6s into cars? I know they don’t usually use big displacement inline-fours because of NVH issues, but what about the other way around?

Thank you for your question, Brian. I’ve been wondering about this very aspect of engineering for a while and you just gave me enough push to go sniffing for answers.

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