This is the first time I've ever seen a car with a tachometer.

Traditional energy and fuel vehicles should not appear in the engine speed, this is because in the new energy car, basically will not have a car with the transmission, but directly with the electric drive module to control the vehicle walking, naturally no tachometer.

Engine speed, a physical parameter, the engine speed of the high and low, the relationship between the number of times per unit of time or the size of the engine effective power, that is, the effective power of the engine with the speed of the different and change.

Therefore, the engine effective power in the description of the size of the engine, must be specified at the same time its corresponding speed.