Aside from the cache, why a six over a four with same h.p.? Smoothness?, 1970-1976 914-4, 914-6 Options

[unpolire]

I have never driven a stock original 2.0 914-6. I have driven properly converted 914s with 2.7/3.0 transplants and my own stock 1.7Ls. Aside from the cache of a six in back, if you can have 200-250 h.p. from a four, why convert to a six? Is there a noticeable difference in torque and smoothness over a properly modified four? Can you feel it on the road? A serious question seeking the definitive answer that could save $10-20K later. Let's hear from both camps, pluses and minuses.

[J P Stein]

Let's throw this challenge up to the big 4 aficionados

Here's a chassis dyno chart from the 2.7L 6 in my old car. Now in all the years I've been on this forum I've never seen a T-4 chassis dyno chart in a 914....lots of pretty designs on paper from hero t-4 builders on their own dyno tho but never through the wheels from an independent source. The first one is the 10.5:1 and the other is 9.7:1. Different dynos.

Whatcha got?