Umm.... Power to Weight Ratio?
2011 Toyota Prius Hybrid
Power......134 Hp
Weight.....3042 lbs (curb)
Thus - 22.7 lbs per horsepower. To match the CBR250Rs power to weight ratio, the Prius would have to produce 220 hp.
2011 Honda CBR250R
Power......26 Hp
Weight.....359 lbs (curb)
Thus - 13.8 lbs per horsepower.
Even if you factor in an average hefty 180 lb rider.
Toyota Prius = 24 lbs per horsepower.
CBR250R = 20.7 lbs per horsepower.
Mike