How to judge the performance of a car?

Now, the car is one of the indispensable means of household transportation, many people hope to have their own private car, but most people do not know too much about cars, so there is a problem, how to judge the performance of the car?

The performance of the car is divided into several aspects, first of all, safety, second handling, then comfort, and then various inconsequential configurations, such as the style of the interior, and the fun of handling. So let's talk about it now.

First of all, it is about safety, and the safety depends on how many airbags the vehicle has, and whether the vehicle has those safety devices. Whatever and so on, it's better to have both, in short, the more these types of security systems have, the better the security. There is also whether the body itself is strong enough, and the better the hardness of the body, the safer the talent will be.

The second is handling, which depends on the specific test drive of the vehicle. If it's a manual transmission, try the gear first, but if it's an automatic transmission, you don't have to. Then when you drive up, try to see if the steering wheel is not empty, whether the accelerator and brake meet your requirements, and whether the power of the engine meets your requirements, in short, the handling must be good.

Then it is whether the interior is comfortable, such as whether the sofa is soft to sit on, and then it is necessary to see if the interior space is designed to be very reasonable. The space is not large enough. Space is also very important, otherwise, space is small.

It can seriously affect driving.

Finally, look at the others, such as whether the style of decoration is more like you, whether there is less hard plastic, whether there are leather seats, etc. In short, this is the most minor, these can be changed later, and the main focus should be on the first few items.

Before a car is built, it has to go through a process of market research, product positioning, product design and modification, and finally on the market, so when a car is built, some of its performance is doomed, even if there are some differences in performance, that is, it is slightly up or down.

Most of the performance of the car is reflected in the power performance. The rest is handling, including pointing precision, cornering stability and limits, and so on. But when it comes to the performance of a car, it is necessary to talk about how well the car performs dynamically.

It is very disappointing that the power performance of the vast majority of competing models of the same level on the market is about the same, that is, when targeting a consumer group, the manufacturer already knows what the car is generally going to be bought by this group of people, and then gives almost enough power. Of course, there are some unconvinced, such as the supercar GK5 (Honda Fit) that we often say, such a small car has the best power performance, and even some of its big brothers have to be convinced.

There are several criteria for measuring power performance: first, zero hundred acceleration; The second is extremely fast performance. The combination of the two can judge the performance of the car, generally the shorter the acceleration time and the higher the top speed, the better the performance of a car.

The second handling is also in this column, the three items are independent of each other but can overlap, only when you get on the car and drive can you have a more intuitive feeling about the performance of a car and evaluate the quality of the car.

The above indicators are generally for sports cars, of course, our ordinary vehicles can also have such test items, which are used to judge whether the car is really good power performance and good performance. ps: Don't talk about any performance when buying a grocery cart!

The performance of the car is mainly reflected in the power system and control system, so the power and torque level of the engine is determined by the acceleration performance of the car, the greater the torque, the lower the burst speed, the faster the car accelerates, the greater the power, and the higher the fastest speed of the car.

You get what you pay for, expensive is not necessarily good, good is definitely expensive.

<> "So let's briefly introduce what is the engine speed, in fact, it is the number of rotations of the engine crankshaft per minute, so it can be roughly understood as the number of times the engine burns to do work and leakage balance per unit time, after all, the vast majority of gasoline engines are four-stroke, and the most core of which directly produces energy is the ignition stroke. Therefore, looking at the automobile engine alone, under the premise that the technical conditions are similar and the same turbocharged engine or naturally aspirated engine, the larger the displacement, the less the number of combustion work required to output the same power, and the lower the speed.

The output power of the engine is very directly related to the specific driving speed of the vehicle, combined with the relationship between the engine speed and the output power mentioned above, so there is a speed of 120 kilometers per hour, and then the engine speed at this time to assist in judging the performance of the car. And it should be noted that in addition to the engine, the transmission efficiency of the gearbox will also be returned to the center of the engine speed under the premise of a certain speed, generally speaking, the higher the transmission efficiency of the gearbox, the lower the corresponding engine rotation speed, this trend relationship and engine performance are basically the same.

To sum up, to be more specific, when the vehicle continues to maintain a speed of 120 kilometers per hour for cruising, observe the specific engine speed on the instrument, the more you can control the performance of the vehicle in the speed range, the better, usually the engine speed of ordinary family cars under this working condition will be located between 1800 and 3500, the closer to the lower limit, the more it can basically indicate that the power performance of the car is relatively good.

At present, vehicles are gradually integrated into our lives, and judging the performance of a car has become the main question for us to buy a car. How do you judge the performance of this car?

When designing a car, designers will improve the performance of the car from all aspects of the car, such as the shape of the car, the height of the chassis, and even the addition of air deflectors. The engine is the core component of the car, and it can also be called the heart of the car. If a car's engine is good enough, then the car's performance will not be so bad that it will not be bad.

However, there is no clear standard to measure the performance of a car. For most masters, a car's engine speed of 120 rpm is considered a standard measure of a car's merits. Friends who have learned to drive know that when the speed of the first gear reaches 2000rpm, you can add the second gear, and so on until the fifth gear.

Generally, when the speed reaches 120, the engine speed will reach 3500rpm. However, manually geared vehicles with slightly larger displacements, such as the Passat, generally rev at 2,700 rpm and 120 mph.

Talking about manual transmission vehicles, let's talk about automatic transmission vehicle handlebars, automatic transmission vehicles generally have eight gears, six gears, and even four-gear cars, Buick Kaiyue 07 version has a four-speed manual automatic vehicle, the car generally reaches 120 miles when the vehicle's speed is about 3000 rpm. The 12th version of the Audi A6L is a six-speed automatic manual model, and the car revs around 2400 rpm at a speed of 120 mph. The Harvard H9's eight-speed manual automatic model only revs around 1800 rpm when the speed reaches 120 miles.

Generally, the engine speed of the vehicle is relatively low, indicating that the engine of this car is better. When driving, feeling that the vehicle is full of power means good performance, while stepping on it means that the engine is of poor quality. However, at lower engine speeds, it is not necessarily good.

There is a certain degree to everything. If the engine speed is too low, it will increase the carbon deposit of the engine and reduce the service life of the vehicle.

Millions of car purchase subsidies.

<>< 3 ways to judge the performance of a car.

The first point is the sound when the engine startsWhen we go to the 4s shop for a test drive, we want to judge the performance of the car, that is, listen to the sound of the engine starting, a good engine makes a very crisp sound when starting, there is no sound of metal impact, when the engine starts badly, the sound is very messy, there is a lot of noise, and it will be accompanied by the vehicle shaking.

If there is noise and more vehicle shaking, the performance of the engine is certainly not so good. Another point of observation is, for example, when waiting for a red light, to observe the engine at idle, if the speed is maintained at about 1000, it can also indicate that the car is performing very well.

The second point is the water droplets in the exhaust pipe. When you have been driving for a while, you can observe if there are water droplets in the exhaust pipe when you get out of the car. If there are a small number of water droplets, it can actually indicate that the engine is performing better because the engine is in the process of starting.

When gasoline is burned to generate electricity, full combustion will form a water vapor ballast gas, and then some water droplets will form in the exhaust pipe. However, if there is too much water in the exhaust pipe, you need to check the exhaust pipe for damage.

The third point is high-speed operation. If you haven't bought a car yet, it's basically impossible to drive at high speeds, but you can try someone else's car first, and at high speeds, if you keep the speed at 120 and the rpm at around 2200, it also shows that the engine is performing very well. Keep in mind that the faster the car and the lower the rpm, the better the engine will perform.

But the speed and rpm we are talking about will vary depending on the model, after all, the fuel consumption of each car is different, and the engine is different.

As long as you keep these three points in mind when buying a car, you can judge how good or bad a car is even if you are a newbie. Whether it's your own car or someone else's, are you buying a used car or a new one? As long as you judge the purchase based on these three points, you will definitely not lose money!

Well, let's say so much, just for the sails, everyone can know these routines in advance when buying a car, so as not to be pitted, and car owners should pay attention when buying a car.

There are many types of models on the market, but the quality is uneven. If you are not careful when buying a car, you will regret it later. Therefore, many consumers will shop around when looking at cars, and try to choose a car with reliable quality at one time. So the question is, how to judge the quality of a car?

Judging that the *** of a car is not good, it is not enough to just look at the parameters. The easiest thing to do is to look at the engine speed at 120. If it doesn't exceed the following figure, it will be a big profit.

It depends on the engine speed as it represents the efficiency of the engine. If the rpm is below 1000 rpm at first, everything is fine. However, if the speed exceeds 1300 rpm, it means that there is a problem with the car radiator and should be stopped for inspection and replacement.

At this time, many smart people have seen that the higher the engine speed, the better. So, when we accelerate to 120 rpm, the engine revs at around 3000 rpm. Bian Xiao suggested that everyone give up decisively.

The engine of this car is not good and prone to breakdowns. Under normal circumstances, the engine speed of a car of about 100,000 can reach 2300 rpm. If it's a 300,000 or 500,000 car, the engine speed may only be 2,100 rpm.

All of the above are normal, and you can start with self-confidence.

According to the financial ability of most people, few people will buy a luxury car of about 300,000 yuan, and most people will buy an ordinary family car of more than 100,000 yuan and less than 200,000 yuan. So when you choose a car, you can see if the engine speed is lower than 2500 rpm at 120 rpm. If it is, it means that the car is not bad, and it will not increase the financial burden on the owner after buying it home.

But if it goes beyond 2500 rpm, it needs to be reconsidered. There are so many models on the market that there is no need to hang on a tree.

There are many ways to judge the quality of a car, but other methods are more troublesome and not easy for car owners to do. But I would like to reiterate here that the method of looking at engine speed can only be used as a reference. Whether you want to buy the car or not depends on how much you like it.

1.The dynamics of a car are expressed in terms of the average speed that a car can achieve when driving in a straight line on a good road surface. The dynamics of the car are mainly evaluated by three indicators: the maximum speed; the acceleration time of the car; The maximum incline that a car can climb.

2.Top speed – refers to the maximum speed that a car can achieve when driving on a flat and good surface. The higher the value, the better the dynamics.

3.The acceleration time of the car - the acceleration ability of the car is also figuratively called the ability to reflect the speed, which has a great impact on the average speed of the car, especially the car, which is more important for the acceleration time. It is often expressed as the acceleration time of starting on the spot and the acceleration time of overtaking.

4.The car's ability to climb – the maximum gradient that the car can climb when fully loaded.

A brake, an exhaust exhaust, and the appearance of the vehicle can have a collision.