Last year, we wanted to benchmark Porsche's Denza, and this year we will bring the Z9 GT to the Beijing Auto Show.
The Denza Z9 GT is positioned as a coupe, with the Porsche Panamera as its benchmark. The car has been planned for some time, and as the auto show approaches, the information about the car is becoming more and more clear. Including the car will be delivered in July this year, including the price of this car may be less than 500,000 yuan, but also includes the E³'s tail logo, low stomach, aerodynamic package, electric rear wing, and 0-100km/h acceleration in 2.02 seconds and other details.
Of course, we already know most of the details of the appearance, and it is also the biggest controversy of this car now, so this subjective judgment will not be too much to develop. This time, let's dig into how it performs in all aspects, not just in terms of power level, but comprehensively.
Since it is necessary to benchmark against a benchmark product like the Porsche Panamera, what about the overall strength of the sporty attributes of the Denza Z9 GT?
Three-motor, how about the re-acceleration ability?
The rear logo of the e³ means that the car is equipped with a three-motor powertrain, and it is standard on all models. A 230 kW electric motor on the front axle and two 240 kW electric motor units on the rear axle form the powertrain of the Denza Z9 GT. The combination of multiple motors has the most intuitive advantage in terms of power, which we can perceive through data.
The Denza Z9 GT is 335 hp higher than the 4.0T Porsche Panamera. It is indeed much easier to make an electric car faster than a fuel car, after all, the connection and energy conversion of the latter's engine and gearbox will eat up part of the power. Therefore, there is no need to analyze too much in the power data, and it is enough to know the gap between the two.
With three motors, won't the center of gravity shift back?
There is one motor in front and two motors in the back, and the front of the electric vehicle is often relatively light due to structural reasons, unlike the engine in the front of the fuel car. At this time, if you install two motors on the rear axle, many people will think that it will be easy to upset the balance. First of all, the weight of a motor is only about 100kg (some high-power ones may reach 150kg), so the motor weight of the Denza Z9 GT is about 100kg before and about 200kg after the motor.
However, in fact, after a large battery is on the car, most of the center of gravity is on the battery side, and the reason why the tram can achieve a 50:50 counterweight ratio is also to eat this dividend. If the DENZA Z9 GT wants to achieve a 50:50 weight ratio in the body, the weight increase caused by the increase in the number of rear axle motors can be solved by moving certain structural parts and parts to the front of the car.
The power level and the counterweight level can theoretically achieve a relatively high level. Then one of the things that needs to be faced is whether the car's reacceleration ability is not working. Often, many trams with good performance will have power attenuation and other conditions under the condition of continuous high power output and continuous acceleration, which means that the heat dissipation of the motor and the heat resistance of the material are not very good.
The two rear axle motors of the Denza Z9 GT use the same 240kW power motor as the Yangwang U9, and the technology of these two rear axle motors includes ultra-thin silicon steel sheet (low iron loss) with greater output power, higher efficiency and smaller size, so the power consumption at high frequencies can also be smaller, and the temperature rise is slower for a long time.
There are also permanent magnets with high temperature resistance grades to improve the efficiency of the motor and reduce heat loss, which are all components that provide support for the heat resistance of the motor. That is to say, the two motor units on the rear axle can withstand the test of high frequency and high power output, and it is not known what its limit is for the time being, but at least its hardware configuration has the ability to make continuous catapult starts.
The prediction should be based on the number of catapults, which is a little different than the 26 times of the Porsche Taycan.
In order to open well, in what other aspects have it been improved?
The motor just solves the power reserve and reacceleration ability, at least giving the car a decent powertrain that can make it go faster. Then, as for making the car easy enough to drive, you still need to make some detailed adjustments, such as wind resistance and downforce.
The visual effect of the whole car is very low, and the posture is good, low enough, the hunting style should be able to fulfill many dreams of wanting to experience the Porsche Panamera. The low body shape, coupled with some details such as hidden door handles, electronic mirrors, active grille, roof spoiler, etc., can also reduce a certain drag coefficient by the way, which has the ability to improve the driving experience. But objectively speaking, these improvements will not be very noticeable.
If you want to say that the whole car, in the original state, can provide some driving experience support, it has to be the electric rear wing.
This function is actually somewhat similar to the configuration on the Porsche Panamera, and the electric rear wing will automatically rise after reaching a certain speed to provide enough downforce support to improve the driving quality of the vehicle. What this electric rear wing can bring is better grip in high-speed conditions, and changes in the level of downforce will especially affect the vehicle's performance in corners.
When the downforce level is lowered, the car is more likely to skid in corners due to less grip, but it is faster on the straights. Conversely, when the maximum downforce setting is set, the vehicle will be able to drive more smoothly in corners.
Judging from the declaration diagram, the area of the electric rear wing of the DENZA Z9 GT in the lateral length is relatively large. The area of the rear wing determines how much airflow it can direct, and the more airflow it guides, which means that a large area of the rear wing can generate more downforce under the same speed and airflow conditions. This is also because the large area of the tail can more effectively change the direction of air flow, forming a larger negative pressure area.
Then, the area change of the rear wing also affects the drag coefficient. The increase in the tail area may lead to an increase in the drag coefficient, which will also increase energy consumption to a certain extent, which is a disadvantage, but fortunately, this kind of electric tail is usually not used, and it will appear in the high-speed range.
But then again, the downforce provided by this small and relatively fixed angle electric telescopic rear wing will only be useful under certain conditions. For example, the sensation in corners is more pronounced after a certain speed is exceeded, after all, it is more of a support than a decisive role.
Let's talk about another topic, whether this car can get off the track.
After the Xiaomi SU7 track incident, we should have a preliminary understanding of the electric car off the track. Electric vehicles are self-important, so when driving frequently and intensely, compared with the consumption of electricity, the greater consumption is actually the braking system, including brake discs, caliper pistons, brake pads, etc., all have certain high requirements.
However, at present, judging from the declaration information and model pictures, in terms of the braking system, the configuration of the Denza Z9 GT has not been adjusted too much for the track working conditions, and I don't know if there will be individual adjusted versions when the model is launched. But judging from the current configuration, this car is not suitable for going to the track at some configuration levels.