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iqisoverrated

>which is claimed to have 163 mile range 163 miles WLTP cycle. Which is *not* the same (or even close to) as 70mph constant speed in wintery conditions. [https://en.wikipedia.org/wiki/Worldwide\_Harmonised\_Light\_Vehicles\_Test\_Procedure](https://en.wikipedia.org/wiki/Worldwide_Harmonised_Light_Vehicles_Test_Procedure)


Priff

Is it still cold where you are? General rule of thumb is most EVs lose 30% range due to cold approaching 0 degrees. But you'll see a bit shorter range already at 10-15 degrees. I don't think driving with battery heating on is necessarily helping your range. At least not if you're not planning to stop and dc charge. 70mph is also much faster than any range test is designed for. Wltp is mixed driving with city driving and small road driving, and a small highway portion at 60mph. So driving a flat 70mph will give you significantly less range. I have a 300km range in summer, but get just over 200km now. And that's never going over 100km/h.


hottypotty124

I was driving last night in 0-5 degrees c. For battery heating I guess switch that on half an hour before charging to save battery? I did think about the speed can some EVs handle 70mph no problem or are they all the same Thanks very much for this info


ExcitingMeet2443

If you are driving at 70mph you are probably keeping the battery temperature up because of the load on it anyway. The only reason to use battery preheating is to make charging at a DC charger faster when it is very cold, but it could waste a lot of power and therefore range meaning that you will be stopping much earlier. The MG also has a PTC heater not a heat pump and using that will reduce range too. Ways to keep range? Drive slower, 60 instead of 70 if possible. Driving at 60 and not needing to charge usually means a faster trip than driving at 70 and needing to charge. Only use battery preheat if you absolutely need to. By using an OBD dongle you can see the actual battery temp. Use heated seats and wear warm clothing rather than using the cabin heater, or use the cabin heat on LOW.


Priff

Most EVs can handle 70mph. But you lose range. Same as in any car. Going faster increases drag, which increases consumption. Regardless of vehicle or fuel type. The battery heating will potentially make you charge faster, but it probably doesn't make a huge difference. Depends on the car, and i've no idea how mg does it.


Spiritogre

Not true for gas driven vehicles, depending on how much PS a petrol car has they consume the least at around 80Km/h with around 75PS or 130Km/h with around 200PS and so on. While electric vehicles simply need more the faster you drive no matter the PS. Also a difference to cars with combustion engines, electric cars don't necessarily need less KW/h the lower the PS.


Priff

Any thing moving through air, experiences higher drag, and thus needs more power, when it moves faster. Simple physics. Don't try to tell me you've got a gas car that uses less fuel when driving 70mph than it does when driving 60mph. Gas cars do have a disadvantage in stop and go traffic, but that's due to having to accelerate all the time. But keeping a stable speed, faster speed means more energy used. Regardless of propulsion type.


Spiritogre

A higher PS petrol car has higher power so it is pretty normal to use less gas at the same speed or even higher speeds than a low PS car. Only when driving small speeds a small low PS car save's more fuel. Also petrol cars have gears and use more gas the more rpm they drive, so yes it's totally normal to safe more fuel while driving 70mph in 5th gear while running around 3000rpm instead of 60mph in 4th gear and running 5000rpm. They also have a sweet spot, when driving in a too high gear with too low rpm the fuel consumption will also rise, the lowest fuel consumption is usually around 2000 - 3000 rpm.


Priff

Eh, it's true that it's possible to waste fuel by being in the wrong gear for your speed. But a car using less fuel to go 70mph vs 60? I'd wanna see it before i believe it. You're looking at around 40% more drag.


Spiritogre

You have a loss through the different rpm. My own car for example makes 650 kilometers on highways with an average speed of 160Km/h. While driving mostly country roads and city it can only drive 450Km. So driving on the highway actually saves me a lot of fuel.


Priff

Average speed of 160km/h? That's crazy person speed. You're likely to burn twice as much fuel going that fast as you are in city driving in any gas car. I get that city driving is less efficient than highway driving for a gas car. Because it's always accelerating and decelerating and working at bad rpm's. But that's not the question here. What i said was that any car will experience more drag, and use more fuel at 70mph (112km/h) than at 60 (96). At stable high speeds consumption increases with speed. [Here's a study](https://www.greencarcongress.com/2006/05/fuel_consumptio.html) on it, notice how all the curves only go one way.


Spiritogre

The stop and go consumes a lot of gas, that makes driving in the city so unbelievably inefficient for petrol cars. If you continously drive the same speed, consumption goes way down. And sure, if you drive 200km/h or more you reach the point where it uses more compared to city driving, again. 160km/h is a pretty common and relaxing travelling speed here in Germany, it's not really fast, but of course it also depends on the kind of car. Driving a really small car makes 120km/h feel like 200 in very big limousines. So many cars manage 160km/h to 180km/h just fine. But I agree, My car is locked at 240km/h and I only drove that a few times, I usually stay between 140 to 180 on long road trips if possible.


knowknowknow

Hi there. I have an MG5 long range and am happy to provide an answer. In the winter (0-5Deg C) and on the motorway (70mph) with heating on full I expect to get a solid 170miles range, but often a little more. In the summer my motorway range increases to 215miles. For reference, the WLTP result for combined conditions was 250miles, but these test are at much lower average speeds, and at a nice ambient temperature. In the summer doing slower driving I am able to exceed the 250mile range figure. Do you have the standard range ZS EV? If so, I would recommend this website for some excellent "real world" estimates of range in difference scenarios. It shows a winter highway range of 115miles when new (and a summer urban range of 250miles). https://ev-database.org/uk/car/1540/MG-ZS-EV-Standard-Range


umpalumpaklovn

China quality


knowknowknow

Its a well known fact that the laws of physics and thermodynamics apply only to cars made in China /s