Gee, what's a few kW between friends? There's all sorts of things that can affect these sorts of tests - they can be notoriously difficult to reproduce. There are all sorts of variables that can creep in. In my career as an industrial chemist, I know how difficult it is to reproduce results between test facilities, and that's only chemistry! Me? I'm just relaxing and enjoying my car. I've never been so happy about anything I've bought in my life.