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One very important thing I see, when looking at that chart, is that since a lot of those numbers are factory specifications, they are most likely all measured in different ways.
Real torsional rigidity of a chassis is measured as the centerline of the axles, with the loads applied at the hubs. This would require rigid shocks, or, on our formula cars, we use 'shock bricks'- steel rods in place of the shocks- which are mounted inboard, on rockers to pull/pushrods. On a road car this isn't very plausible to test, so alot of numbers are pulled out of either simulation or thin air.
The key is that just putting two solid mounts on the chassis and twisting it is not loading it in the way that it is in real life- through suspension components. So a lot of numbers that people quote are just total BS.
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