IMHO, the two best automotive engines available today are the Dodge Ram/Cummins Diesel I-6 and the Subaru Boxster H-4. I own one of each so I’m a little prejudiced... I do not have any experience with the Subaru Boxster H-6 but I suspect that is a good engine too.
I read an article in Popular Mechanics years ago that discussed engine designs and which were the smoothest. I-3, H-4, I-6, V-8, V-12, V-16, etc. were all inherently smooth. I-4 was awful and required a counterweight on the crank to prevent the engine from vibrating itself apart. Put two I-4’s side-by-side to make a V-8 and that balanced it out. V-6 is a poor design that requires counterweights as well. Two V-6’s make a V-12 which is balanced but would make a huge engine.
Two V-6s make a V-12 which is balanced but would make a huge engine.
Yes, it does................