2000 rpm, can run to more than 120 cars, what models are there? In general, our family cars have a speed of 120 km/h, and the speed varies between 1800-3500 rpm, which varies from model to model, some models can even be less than 2000 rpm, and some models may be higher than 4000 rpm (vans, vans). In fact, there are still quite a few models that can meet 2000 rpm and can run to more than 120, mainly divided into the following categories:
A model with strong power and strong low twist
Typically, turbocharged models such as 1.8T, 2.0T and above
In the current situation of turbocharging, turbocharged engines can achieve a lower speed of 120 hours, because the maximum torque range of turbocharged engines is wider. For example, the 1.4T engine on The Langyi can output a maximum torque of 250 Nm at 1750 rpm, while the Camry can output a maximum torque of 250 Nm until 5000 rpm, so the turbocharged engine, especially the turbo engine with a displacement of 2.0T, is easier to reach a speed of 120 rpm of no more than 2000 rpm.
Long-stroke small bore engine
Such as volkswagen EA888 series
Displacement and speed are not necessarily inversely proportional, and the current engine design on the market has two orientations, namely short stroke large bore and long stroke small bore. Short stroke large bore as the name suggests is that the engine work travel is shorter, need to work faster speed to obtain the same power, such as the French system of high speed engines and some large-displacement self-priming engines, which is why many large-displacement self-priming engines have a higher speed at 120 hours. The other is a long stroke small bore, by increasing the stroke, reducing the speed to obtain strong power, typical is the Volkswagen EA888 series.
A car with more gears and a wide transmission ratio
Such as LaCrosse, Cadillac CT6, XT4 and other models equipped with 8-speed and above transmissions
Note that the wide transmission ratio does not mean that the larger the transmission ratio, the smaller the speed of the car. On the contrary, the smaller the gear ratio, the lower the rotational speed. The larger the transmission ratio, the more the engine turns many times, and the wheel can only turn one turn. Because of the speed of 120 per hour, the gearbox must be in the highest gear, we can look at the transmission ratio of the highest gearbox in the highest gearbox. ZF's 9AT minimum gear ratio is 0.48, and GM and Mercedes-Benz's 9AT minimum gear ratio are both around 0.6. The lowest gear ratio of the famous ZF 8AT is 0.667. Therefore, as long as GM is equipped with 9AT or 10AT models, the 120 cruise speed can reach less than 1700 rpm.
Although it is not strict to use speed to define whether a car is a good car, if the speed of 120 per hour is cruising, the speed is lower than 2000 rpm, at least two points are proved, the first car is powerful, low torque, and the second car has strong fuel economy. So keep this number in mind, if the speed of 120 is lower than this value, your car can be called a good car.