Hi,
I'm a fan of the EPA "Data on Cars used for Testing Fuel Economy":
https://www.epa.gov/compliance-and-f...g-fuel-economy
Recently I noticed that the 2017 Prius c had a distinct drop in rated performance:
Other than adding TSS-P, the radar and optical dynamic cruise control and collision avoidance, I was not aware of any significant changes. But look that MPG hit.
So I used the downloadable data for the 2016 and 2017 Prius c and found:
- 125 lbs added
- 82 hp -> 72 hp
Ok this begins to suggest what is going on. Car bloat on the weight but the loss of hp doesn't make any sense. Regardless, I plotted the highest mileage numbers and go this:
So the loss of MPG begins to make sense as it came from the more recent model. YECH!!
I also calculated the drag HP vs mph and found:
The car drag has gone up significantly. This does not make a lick of sense and suggests the 2017 Prius c has gone retro.
Has anyone else noticed changes in the EPA data?
Bob Wilson