Comment Re:Top Gear had an interesting experiment (Score 1) 403
That's not surprising. The Prius has an Atkinson cycle engine which can be efficiently and quickly turned on and off, but it has a very low power density. This means that the Prius performs well when coasting (as it can turn off the gasoline engine when it doesn't need it), but poorly when accelerating hard. Most driving consists of short periods of acceleration and long periods of coasting, and the electric motor can handle a lot of the work for low speed acceleration and maintaining cruising speed, which means that the power density of the gasoline engine isn't very important for every day driving. However, if you are constantly accelerating hard, then the electric motor is wasted, the advantages of the Atkinson cycle engine are minimized and the disadvantages are maximized. If you keep it up for a long period of time, the Prius will not perform well at all. (The aerodynamic body would probably help when constantly accelerating hard, but I suspect its benefits would drop off as its speed increases.)