https://www.reddit.com/r/VinFastComm/comments/1cu4rfm/vuong_phams_trick_the_vf3s_real_world_range_is/

You know, Vuong Pham says VF3 range is 210 km and people take that for granted, thinking 210km is enough. Well, here is the trick: he used the NEDC’s standard, which is the most inflated one. Details below.

There are 3 standards: NEDC, WLTP, and EPA.

NEDC is the mileage under the ideal condition, you know, constant speed, flat track, cool weather: Single driving cycle in a lab using a treadmill-type device, Temperature between 68 and 86 degree Fahrenheit, Doesn’t include real-world driving factors, such as air conditioning, lights, or radio use. NEDC is always the highest number among the three. See more details: EV Ranges Explained: EPA, WLTP, and NEDC (lifewire.com) EPA is the one most close to real world driving.

Here is the rule of thumb (the relationship is not linear but this is a "rule of thumb", an approximation):

WLTP is about 20% less than NEDC, and EPA is about 30% less than NEDC. EPA = 85% WLTP.

For example, looking at the 2019 BMW i3 BEV, you can see how the different reports vary wildly: NEDC: 223 miles, WLTP: 177-193 miles, EPA: 153 miles.

So the VF3 has 210 km NEDC. That means EPA range (the realistic one) is only about 147 km (70% of NEDC). This will be the number in the real world driving. Whether or not it is enough depends on the individual person’s daily driving range, but the point is: VF3’s real world range (EPA) is about 147 km only, not the 210 km.

Another check: the VF3’s battery is 18.6kWh. On average, 1 kWh gives you 4.8-6.4 km (very efficient one): ᐅ Electric Car Mileage - How Good Are Modern EVs Really? (justwe-gpi.com) Let be generous and use 6.8 km / kWh for VF3, the most efficient one. That implies: 6.8 x 18.6 = 126 km range.

How about the actual km/kWh numbers from Vinfast’s cars? Here:

r/VinFastComm - Vuong Pham’s trick: the VF3’s real world range is not 210km, it is far less: 120 km

km/kWh EPA equivalent = 85% WLTP figure.

Thus, we have been very generous to use the 6.8 km / kWh for VF3. In reality, it should be round 5-5.4 km / kWh for a range of about 100 km (= 5.4 x 18.6).

So by multiple ways, I have shown that VF3’s real world range is only about 100-147km, so let’s take the middle: 120km. Not 210 km. Real world range or EPA range is what matter.

You see, Vuong Pham is using the unrealistic NEDC figure of 210km to make the range appear much much bigger than the real world driving's range. For the marketing trick. He did not tell lies but surely it is a gimmick. It is shady.

Translate and share the truth that VF3’s real world range is only about 120 km.

At least VF3 buyers in Vietnam deserve to know the truth about the range.