Audi, BMW and Mercedes have competed against each other in pretty much every segment. However, the world had to wait a long time for a comparison of three electric SUVs from these houses. Strictly speaking, it is still waiting, after all the BMW made in China is coming i X3 to Europe at the beginning of 2021. But at least the most important facts and figures are now on the table for him. And as precisely as the competitors in the same segment compete, the differences are great.
The BMW is the most economical
With combustion engines, we would start with the engine key figures. With e-cars, range and energy consumption are more important. Here the BMW contacts the Great: According to the WLTP, it can travel up to 460 kilometers, according to the NEDC it is even 520. The corresponding power consumption: 18.5 to 19.5 (WLTP) or 17.5 to 17.8 kWh per 100 kilometers (NEDC). These are strong values, at least in this competitive environment. According to WLTP, the E-Tron 55 Quattro consumes 22.4 to 26.4 kWh /100 km (according to NEDC 21.0 to 23.1) and can travel a maximum of 437 kilometers. For the EQC 400 4Matic, Mercedes specifies a power consumption of 20.2 to 21.3 kWh /100 km and a range of 429 to 454 kilometers according to the NEDC or 20.5 to 23.2 kWh /100 km and 370 to 414 according to WLTP .
The consumption advantage of the BMW can be attributed to its engine - in two ways: Firstly, it only has one, which sometimes costs less energy. Second, it has a (current excited) synchronous machine - this type is lighter, more powerful and more efficient than the asynchronous machines (ASM), which Audi and Mercedes use. In contrast to permanently excited synchronous machines (PSM) with magnets, copper coils in the rotor with current on the BMW machine generate the magnetic field, the motor does not need rare earths.
The range advantage of the iX3 is accordingly noticeable given its smaller battery. While its lithium-ion battery has a net capacity of 74 kilowatt hours (gross: 80), the Mercedes can use 80 kilowatt hours and the Audi even 86.Provided that the 55 version drives up. Because the E-Tron is now also available in the 50 Quattro version with a battery capacity of 64 (net) or 71 kilowatt hours, consumption from 20.9 to 23.2 (NEDC) and 21.2 to 25.1 (WLTP) ) kWh /100 km and a WLTP range of 286 to 339 kilometers.
The single-engine BMW is the weakest
In terms of performance, the 50 E-Tron is much closer to the BMW than its own stronger brother. Because the newcomer from Munich or Shenyang is clearly the weakest representative of the electric trio: Its electric motor has a peak output of 210 kW /286 PS (in the long run it is only 80 kW /109 PS) and delivers a maximum of 400 Newton meters. The Audi E-Tron 50 brings 230 kW (313 PS) and 540 Newton meters (E-Tron 50), with the continuous output settling at 100 kW (136 PS).
This also applies to the E- Tron 55 Quattro, which then gets complicated. Its peak output is 265 kW (361 hp) and the maximum torque is 561 Newton meters. But there is even more, namely when boosting (300 kW /408 PS and 664 Newton meters). And the Mercedes? With its two engines it parries the performance values of the E-Tron 55 and saddles up a lot in terms of torque (maximum 760 Newton meters).
Audi and Mercedes with all-wheel drive
Audi and Mercedes not only have via two motors each, but also as many driven axles. The BMW mono engine only directs its power to the rear wheels. This fact and the significantly lower performance lead to disadvantages when accelerating: From zero to one hundred, the iX3 takes a whopping 6.8 seconds a whopping 1.7 seconds longer than the EQC 400. The E-Tron 55 sits in between with 5.7 seconds on, while the E-Tron 50 accelerates exactly at BMW level. The top speed only plays a subordinate role in electric cars and is quite close at 180 (BMW and Mercedes) compared to 190 and 200 km /h (E-Tron 50 and 55).
Speed is more likely in this segment important at the socket or charging station. The BMW iX3 pumps at most direct current up to 150 kW in its battery; after 34 minutes this should be filled to 80 percent again. The Audi also charges with a maximum of 150 kilowatts and also needs around half an hour to be ready for the next long-distance stage. Mercedes lags a little behind: The EQC sucks electricity with a maximum of 110 kilowatts and consequently needs around 40 minutes to charge the battery from ten to 80 percent.
The Audi is the largest and most spacious
Incidentally, all three of our virtual comparison opponents are generously dimensioned. Even the relatively short BMW measures 4.73 meters in length, the Audi even comes to 4.90 meters and the Mercedes is somewhere in between. This is also the case with the wheelbase, with the widththe iX3 and the EQC just swap places. The Chinese man from Munich only reverses the situation when it comes to vehicle height: At just under 1.67 meters, it is clearly the tallest in front of the Audi and the Mercedes, which are around four centimeters lower.