Remember that SRR was with rollers and Abbey uses a hub dyno, so it's expected to show different figures.
If I read the past threads right, the manner of strapping down also plays a factor, so if SRR did strap down tight, then lower figures would read as the car cannot "climb" the rollers.
Yeah i know matey just puts things into perspective regarding my car too and also not to take rolling roads are a true output of your cars power