Was this a reputable tuner or a backstreet garage? This is a revo stage 1 if anyone interested in the graph.
View attachment 24841
I would ignore this fantasy maximum power - engine figure! of 228.4bhp.
The maximum power they have measured at the wheels of 166.2bhp is from the measured wheel torque. There is no way it has lost 62.2 bhp! or 27% from the engine power!
A more realistic 'estimate' calculation of engine power from wheel power is:
FWD cars - add 10 bhp to the wheel figure and divide the result by 0.9
So 166.2 wheel power would be more like 196 engine bhp - 15.1% loss.