In the Feilv car headlight test column, including today's BMW 840i, a total of 6 BMW cars were tested. The most expensive car is the BMW 750Li (1.988 million), and the most expensive headlight is the BMW X7 M50i (5.5 million), the longest headlight illumination distance is the BMW 6 Series GT (122.9 meters). It can be seen that it is not necessarily that the unit price of the lights of expensive models is the most expensive, nor does it mean that the more expensive the lights, the farther the illumination distance will be. So: This is actually the purpose of Feilv Motors’ decision to set up a headlight test column. Maybe 80% of consumers will not focus on the headlights when choosing a car, but 99.99% of drivers drive at night. Experience, it is very important whether the vehicle lights work well or not!
Today’s protagonist is the BMW 840i Convertible Coupe, which is the most expensive version of the 8 Series currently on sale. Compared with the entry-level four-door hardtop model, in addition to richer details and configurations, the soft-top convertible is the core of the budget increase. a little. The length of the convertible model is 4857mm. Coupled with a very long front and a body height of only 1350mm, the vehicle is visually very slender, especially when the top is opened. At first glance, it feels like a large GT sports car.
The 8 Series is indeed hard to see on the road. Perhaps most people with such a budget have set their sights on the Porsche Panamera. After all, the brand has a stronger premium capability. But whether it is the Porsche Panamera or the direct competitor AMG GT, models in the same price range may not have as high a return rate as the 8 Series, especially this soft-top convertible version, because many people have never seen this car on the road, especially It's after opening it!
The soft-top convertible can be opened or closed in 15 seconds at speeds of up to 50 km/h. The process of opening and closing the convertible will attract the attention of passers-by for these ten seconds, which will definitely make you feel that your money was well spent! And compared with some hard-top convertible models, if it rains while driving, you don't have to find a place to stop the car to close the top, which is more calm.
Needless to say, the headlight configuration of this top-end version of the 840i can naturally represent the high-end level of the BMW family (except for the new 7 Series/i7). In terms of functions, it has matrix headlights, adaptive high and low beams, lasers, cornering assist, etc. In terms of intuitive feeling, except for the different shape, it is no different from the BMW 750Li that the editor of Feilu Automobile tested before. So this big car has What is the true level of the lamp?
Model: 2022 840i Convertible Coupe M Sports Package
Light source: Both high and low beams are LED Features: Matrix, adaptive high and low beams, corner fill light, laser
Car light quotation: The headlight quotation of the test model is 42,000 yuan. This quotation comes from the after-sales order price of the 4S store, which is the price at which everyone buys a car light. The price is indeed not cheap. After all, the price-to-price ratio of luxury brands is still very high. But if you compare some models we have tested before, you will find some "value for money". For example, the Audi Q7 (price: 804,800 yuan), which also has laser headlights, is priced at 58,000 yuan; the BMW X6 (price: 966,900 yuan) is priced at 49,000 yuan per headlight. It can be seen that the price of car lights is not necessarily "proportional" to the price of the car. In addition, the price of headlights does not mean that it is proportional to the actual experience. In short, the test is over!
Lamp group composition & configuration analysis:
BMW's headlight design follows a pattern, that is, it gets smaller and smaller! The models on sale that have not been updated are the new 7 Series and i7. In terms of function, to describe it in one word, it is a small but complete machine! Achieving multiple functional divisions in a small light group structure will test the skills of the headlight supplier. The headlight structure of the 8 Series does not look complicated (compared to that of Mercedes-Benz), but it has all the necessary functions. It is understood that BMW has more than one headlight supplier. Giant brands such as Osram and Valeo serve as suppliers to many luxury brands. The specific model or car series must be based on the needs of the designer, the supplier's technology and Determined by factors such as quotation.
In terms of structure, there are four high beams and four low beams. Due to the use of miniaturized matte lenses and a highly integrated design, they have good light mixing capabilities. The upper part is a lens LED low beam, and the lower part is a reflective LED high beam, integrated into one, with follow-up steering and ADB shielding functions. Not all 8 Series models are equipped with laser headlights as standard, and the entry-level model costs 17,000 yuan as an option. The unique blue embellishment in the shape of the laser headlights is like wearing a pair of contact lenses on the LED headlights, making the headlights look more technological. In China, laser headlights play more of a role in improving Good looks, after all, there are too few environments where laser headlights can come in handy.
The taillights of the 8 Series are as outstanding as its plump buttocks. The deep light body is very recognizable at night and effectively widens the visual width of the tail. This design does not look good now. Nothing will feel dated.
In terms of lighting atmosphere in BMW cars, it is generally recognized that it is still far behind compared to Mercedes-Benz. The 8 Series also only has 11 colors of ambient lights, but the editor personally feels that the ambient lights of Mercedes-Benz are a bit too exaggerated. In comparison, The BMW is just right, it mainly depends on preference.
Car light brightness measurement unit: Lux (Lux)
Definition: When an object is uniformly illuminated by light and the luminous flux obtained on an area of 1 square meter is 1 lumen, its illumination (light intensity) is 1 Lux.
Note: In the actual test of Feiling Auto, in a dark room, an ordinary candle is lit, and when the human eye is 30cm away from the candle flame, the light intensity experienced is 10Lux.
In the aspect of car light irradiation distance, we take the brightness of 10Lux as the minimum illumination limit, and take the distance value when this brightness is reached, which is the end point of irradiation for the final measured headlight score. 20cm is generally the minimum height of the vehicle's front bumper from the ground. We choose this position as the lowest position illuminated by the light. The distance from this position to the headlights is the illumination distance.
Illumination distance test:
The low beam performance of the BMW 840i Convertible Coupe can be described as very powerful. According to our past test experience, models with a low beam of more than 50 meters can score high in terms of actual experience. Here is a comparison: Audi Q7 The farthest distance of the low beam is 58 meters, and the maximum distance of the Mercedes-Benz S-Class is 52 meters. It is worth mentioning that the low beam of the BMW X7 reaches 72 meters, and the 8 Series is very close to the X7. Generally, among original factory headlights, the low beam can be close to 70 meters or more than 70 meters. It is really uncommon, even if there is one, it will be. It's a god level.
In the high-beam section, the BMW 840i Convertible Coupe achieved a score of 105.2 meters. To be honest, this result was expected. There is no problem with the performance beyond 100 meters, but the performance above 100 meters is definitely not a surprise. As for why it is expected, it is because after many phases of testing, we have verified the theory that "models with laser headlights generally do not illuminate that far with LED high beams." It can be understood that with laser headlights, LED high beams do not need to shine so far, because when encountering a scene with no visible light, the laser headlights will turn on, and the illumination distance is more than twice that of LED high beams.
Here we will continue to make a comparison, let’s talk about models with laser headlights first: BMW 750Li high beam 108.6 meters, BMW X7 high beam 111.1 meters, BMW 4 Series high beam 93.3 meters, BMW X6 high beam 88.7 meters, Audi Q7 high beam The light is 101.3 meters; look at the models without laser headlights: the BMW 6 Series GT high beam is 122.9 meters, the FAW-Volkswagen Landscape high beam is 144.3 meters, and the Mercedes-Benz E Coupe high beam is 205.6 meters! Through comparison, it can be clearly confirmed that what we said earlier is that "models with laser headlights generally do not illuminate that far with LED high beams."
In horizontal comparison, Mercedes-Benz's geometric multi-beam headlights are actually more in line with domestic car use scenarios. It's not because laser headlights are bad, it's because the conditions for turning on laser headlights are too harsh, and with the country's developed infrastructure, it's difficult to have the conditions to put laser headlights to use. Take BMW as an example. The laser headlights can only be activated when the speed is 70km/h and there is no visible light ahead. There are too few such scenes in China. Unless it is possible on a relatively remote highway section late at night, most car owners should not be able to experience it. In comparison, Mercedes-Benz's geometric multi-beam headlights actually play a greater role. Take the Mercedes-Benz E Coupe as an example. Although Mercedes-Benz does not have a laser, it can achieve a irradiation distance of 205.6 meters with its LED high beam, which is almost double the LED high beam of BMW and Audi models with laser headlights! The illumination distance is longer and you can avoid the lights of oncoming vehicles very well. It will not affect others, but you are very happy. The key point is that it can illuminate the high beam at a distance of 200 meters, which is enough even in an environment where laser headlights are turned on. Looking at it this way, in fact, canceling the configuration of laser headlights for medium-sized models and making the brightness of LED high beams stronger may be closer to the domestic car use scene, and the elimination of lasers can also reduce a lot of costs.
Features: Adaptive high and low beams
(Automatic high beam will be turned on when the speed reaches 30km/h, and will be turned off automatically when the speed drops to 20km/h)
BMW's adaptive high and low beam function is still very comfortable in terms of actual experience. The conditions for turning on the high beam are very friendly. It does not require a high vehicle speed. It can light up at 30km/h and automatically turns off the high beam when the vehicle speed drops to 20km/h. The recognition efficiency and accuracy of the camera are impeccable. Luminous objects in the front that are not very bright can be well recognized. The high beam can be lit in sections. In urban areas, even when there are street lights, some dark areas can For example, the signage lights will be lit individually. In the adaptive high and low beam mode, there is no need to worry about dazzling the driver of the oncoming vehicle. When you first see the oncoming vehicle with the naked eye, the high beam will no longer reach the front area of the oncoming vehicle.
Editor's summary:
Overall, the headlight test results of the BMW 840i convertible coupe are remarkable. Especially in the low-beam section, the result of nearly 70 meters ranks in the top 3 among the 45 models currently tested by Feili Automobile, and can even beat the high-beam results of some A0-class cars in an instant. The actual experience is just like the measured results. The low beam feels very sufficient. As for the high beam, it is indeed the same as the previous BMW and Audi models with laser headlights. The irradiation distance of the LED high beam is just over the 100-meter mark. The distance is not a surprise, but it is. It does not affect the actual experience, but compared to Mercedes-Benz's geometric multi-beam headlights, laser headlights are indeed not suitable for domestic application scenarios. It would be more practical to make the LED high beam brighter.
The above also makes the editor look forward to the headlight performance of the new generation of BMW 7 Series. What innovations has it made? Without further ado, we will start looking for a car in the near future, please stay tuned!
