EV's ranked by efficiency
Discussion
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
If you need 250+ miles of range yes. As long as 200 miles at this time of year and 230 or so in summer works for you then definitely the M50 is the one to have. I'd also assume you were driving it rather more enthusiastically than you do the i3?I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
Agree those figures are far from great (identical to our 2600kg eTron 55 in fact) but they far from render it unusable for most people and it has a huge amount of performance (540bhp) into the bargain.
SWoll said:
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
If you need 250+ miles of range yes. As long as 200 miles at this time of year and 230 or so in summer works for you then definitely the M50 is the one to have. I'd also assume you were driving it rather more enthusiastically than you do the i3?I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
Agree those figures are far from great (identical to our 2600kg eTron 55 in fact) but they far from render it unusable for most people and it has a huge amount of performance (540bhp) into the bargain.
Curley - how did it drive? Coming from an A6 diesel so expecting it to be a massive upgrade dynamically.
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
I’ve not had that out my Model 3 for the last 18 miles - too many variables I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
SWoll said:
Got to wonder what you guys are up to. This is from 21 miles of fairly mixed driving my wife did today in the incredibly inefficient eTron, and she's not known for her light right foot. 
The 1.5 was from a quick trip to the shop last night which is about a mile away.
I’d rather not incriminate myself too much but I suspect a big chunk was battery heating. The 1.5 was from a quick trip to the shop last night which is about a mile away.
Not sure what the differences between the i3 and i4 in this area, but pick a stone cold i4 up from a dealer, spend 10 mins before driving with the heater on, playing with the controls and looking around it, then driving it to see what it could do isn’t conducive to good efficiency and fairly typical for a test drive.
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
We are entering a weird world. Super light shopping car compared to 544bhp performance saloon and to fix the “efficiency” problem a totally different type of car is recommended !?I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
Just go in with your eyes open guys.
JonnyVTEC said:
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
We are entering a weird world. Super light shopping car compared to 544bhp performance saloon and to fix the “efficiency” problem a totally different type of car is recommended !?I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
Just go in with your eyes open guys.
Drive a 700hp EV in an identical fashion to a 200hp EV.... virtually no difference. Very fast EV's aren't thirsty at all - at least until you drive them very fast
JonnyVTEC said:
We are entering a weird world. Super light shopping car compared to 544bhp performance saloon and to fix the “efficiency” problem a totally different type of car is recommended !?
Just go in with your eyes open guys.
Nothing new about the world to my mind. While hybridisation might have levelled things up a bit, a small-engined petrol hatchback was/is always more economical than a saloon or SUV. Different expectations within different vehicle-classes. Same steak, different sauce!Just go in with your eyes open guys.
curley said:
I had a BMW i4 M50 for an hour today , fully loaded inc 20inch wheels .
I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
It seems to correlate well with the 2x-ish difference in weight.I managed 2.2M/KW that compares with the 4.0M/KW i am getting out of my i3
Not a scientific comparison and I would probably get more away from a test drive but i think single motor ,19inch wheels would be the way to go on the i4.
TheDeuce said:
Drive a 700hp EV in an identical fashion to a 200hp EV.... virtually no difference. Very fast EV's aren't thirsty at all - at least until you drive them very fast
I'm afraid that is demonstrably wrong. Over the past 3 years we have had 3 EV's and despite pretty much identical usage averaged the following efficiency BMW i3 120ah - 4.5 mi/kwh
Tesla Model 3 performance - 3.2 mi/kWh
Audi eTron 55 - 2.3 mi/kWh
if you watch any of the carWow range videos the lower powered EV's consistently deliver considerably better efficiency despite driving at the same speed on the same route. Rich Symonds also made a video that shows the difference in detail and how charging speeds affect things .
Weight does of course play a part, as does the aero drag rating of the vehicles in question.
I'm not planning to watch that video but isn't battery size/weight and power closely aligned? I'm pretty sure the main constraint for power is the battery and if so, you're not looking at efficiency as a function of power but as a function of weight. It's not like in ICE where you can get mahoosive amounts of power in light cars and you can make light cars inefficient as a result. That just doesn't exist with EVs. Unfortunately.
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