Quite correct Stuart. A 90° V is naturally balanced. I guess we will have to give it a couple of hits to spread the V another 30°.

Actually I have searched to see what V4 engines have been made in the past and they are very few and far between in car applications. Quite a few bike V4s of course.

In car engines there are the Lancia V4s which are more like a straight 4 with offset cylinders to make a compact engine. Other than that it seems V4s are not considered to be worth the effort. I don't think any V4 car engines are in current production.

Peter

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