As we all know, the three core technologies in the automotive field refer to the engine, gearbox and chassis, which are related to the economy, comfort, control, fuel saving and many other aspects of the car. Therefore, for every car purchase consumer crucial to the reader. Among the 100,000-class compact SUVs in China, apart from the Haval H6 and Boyue, which were launched relatively early, Changan Auchan X7 and Song Pro are both rising stars that debuted in 2019. As a product of the century-old Changan, Changan Auchan X7 has delivered satisfactory answers in terms of good looks, large space and rich configurations, which I believe everyone has witnessed. Of course, Song Pro is also very good in terms of internal and external design and space. In some aspects, it can be said to be evenly matched with Changan Auchan X7. However, today we are going to compare the three most critical parts of the two models to see which one they are. It is a popular compact SUV that meets the three good standards.
?Who has more power?
Of course, we cannot deny that Song Pro’s 1.5T engine is still relatively good, but since the Changan Auchan X7 was launched, it has been surpassed in the limelight. . This engine's water-cooled intercooling technology is very useful. In addition to being able to adjust the intake air temperature, it can further reduce turbo lag, thereby increasing fuel economy and improving acceleration performance. In addition, this Blue Whale power sweeps the fresh air entering the cylinder directly into the exhaust system through the forward pressure difference between the intake and exhaust pipes, reducing residual exhaust gas in the cylinder, improving charging efficiency, and improving engine performance. The low-end torque of the engine is increased by more than 20%, and the starting performance is also significantly improved.
The above is not enough. The 1.5T engine of Changan Auchan X7 can improve the engine's high-speed performance by appropriately reducing the exhaust back pressure, thereby improving fuel economy and ensuring acceleration response performance. In order to further optimize NVH, the engine also uses roller rocker arms, hydraulic tappets, silent chains, TVD and a number of noise and vibration reduction technologies. In addition to more than 40 sound insulation measures throughout the vehicle, the quietness is also outstanding.
Judging from our actual experience, both cars equipped with 1.5T engines can meet the original design intention and car usage goals of fuel economy and performance, but the Changan Auchan X7 will perform better in details than the Song Pro. Well, such as stronger power, faster acceleration, etc. These are all advantages that can be added points.
Who has the advantage in gearbox?
Specifically, the Changan Auchan X7's transmission uses a clutch provided by the internationally renowned BorgWarner, which has more advantages than a dry dual-clutch transmission. It not only has the flexibility of a manual transmission but the flexibility of an automatic transmission. Comfortable, it can also provide uninterrupted power output, bringing a smooth and comfortable driving experience and abundant output power. In order to adapt to domestic stop-and-go road conditions, this 7-speed dual-clutch gearbox also uses a wet clutch to increase the lubrication and heat dissipation effect of the transmission structure and avoid problems such as jitter and overheating caused by a dry clutch.
The TCU part of the gearbox was completed by Continental Germany, thus establishing a mature control framework. Changan Auchan's engineers have gathered R&D capabilities at home and abroad and independently developed a number of patents and software to meet the car-using habits of domestic consumers. In order to improve reliability, the bearings of this dual-clutch gearbox are from Schaeffler and can withstand the challenges of various working conditions.
Who is satisfied with the chassis? Changan Auchan X7 is the first in its class to use a flexible subframe, which can absorb and attenuate a large amount of vibration and noise transmitted from the road to the interior space of the car, weakening the bumpy feeling on the road and the vibration and noise in the car, bringing a more outstanding driving experience Feel. Objectively speaking, this is not only the addition of rubber flexible parts to the chassis, but also a major test for the entire chassis adjustment, which is usually used for models under luxury brands.
Thanks to the strong R&D strength of Changan Detroit and the British R&D center, the Changan Auchan X7 surpasses the Song Pro in the overall performance of the chassis. On complex roads, Changan Auchan X7 uses the flexible subframe design to absorb and reduce the bumps on the road and the vibration and noise in the car, thus having full control and comfort confidence.
Comparison summary: Through the analysis of the "three major parts" of the two cars, we can see that the Changan Auchan X7, as a family car with a price of 100,000 yuan, has the same features as a car with a price of 200,000 yuan. The strength to compete with others is indeed beyond many people's expectations. From the perspective of car use, Song Pro has absorbed a lot of BYD's car-making experience, but compared with the century-old Changan, this time is much shorter, and the technology is also conservative and not so perfect. As ordinary consumers, we don’t need to know too much about car-making parameters. It is enough to see that Changan Auchan X7 has the performance of a true three-good compact SUV based on appearance, space and configuration.