Look at the graphs a little closer...
1st graph ( baseline ) is metric - Speed ( km / hr ) & Power ( kW ).
2nd graph is Speed ( mph ) & Power ( hp )
1st graph is showing stock with no work ( but in metric measurements ) with four runs of 162, 163, 164 & 167 kW ( not hp )
2nd graph is comparing no headers ( blue line - 224 hp ) and headers ( red line - 231 hp )
Nick
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