Some details from the test
the 440 was 9.5:1 compression with 906 heads milled to reduce volume from 87cc to 83cc and a valve job back in 2001.
the 426 was 9:1 with standard iron crate motor heads as cast
On the Hemi, they claimed to be running Ray Barton's valvetrain setup reduced to 1.5 ratio rockers so actual valve lift would be similar
The 440 had the edelbrock six pack manifold
The 426 had a marine style dual plane with two Holleys
I think its important to point out that one engine was built down while the other had a bit of help to make the test more..."equal".
This stupid kind of BS is what makes a test like this a joke. Obviously, a Hemi and a wedge like different cam profiles and will tolerate different compression levels. Using mods that are not optimized to the engine is ridiculous. Nobody interested in performance buys a hemi and kills the lift and drops the compression.
Either test a pair of totally bone stock engines, or even better make changes to each that are optimized for that motor.
