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Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

tesla.com

141–150 of 358 posts

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#141

I wonder how much of this will translate to real world driving. Teslas have generally significantly underperformed in real world range compared to EPA. This reads very much like they're optimizing more towards a benchmark.

Well, duh. It’s a consistent test that you can benchmark.

The same thing happens with ICE cars. I drove a Cadillac that would get like 27-28 mpg highway but 10 in the city, as they used gearing and cylinder management to optimize highway mpg.

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#142
post #135

Earlier quoted context omitted.

There are some reviews of the Porsche Taycan where the car lost most of its range very quickly when the driver was accelerating quickly. The Tesla Model S is one of the fastest-accelerating cars available at any price. If you drive it like a normal person and obey the speed limit (approximately), you will get close to the EPA rating depending on weather etc. If you actually use all the power it has (and you manage no…

Yes, this is why they have these tests attempt to do this in an apples to apples fashion, and the most scientific of these tests seem to show Tesla overestimates their EV range the most of any automaker.

Just to be clear: EPA tests the cars and calculates the range, not Tesla (or any other car maker).

Therefore Tesla cannot "overestimate" EPA range.

If you think that EPA range is not accurate, then you can blame EPA.

And since you bring science, who are "they" and in what way their tests are more scientific that EPA's tests?

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#143
post #46

Earlier quoted context omitted.

I can duplicate pretty much the same effect with cruise control in my gasoline powered car. If I go on a 5 hour freeway road trip with cruise at 65mph and spend 95% of my time in the right lane, there's definitely a 2-3 mpg improvement in fuel consumption, vs 75 mph. At that point it becomes a tradeoff in time vs money spent on extra fuel, and need to get somewhere in a hurry. Over a 4.5 hour period if I can cruise a…

For ICE cars, it depends on what the mfg has optimized for. I had an Infinity years ago and I remember that it was optimized for 70mph precisely as per the owner's manual. Higher or lower speeds would be less efficient.

Interesting(ish) tangent - the UK fuel economy specs used to be published at a constant 56mph & 75mph. When the Mk3 Vauxhall Cavalier was launched in the late 1980s, it had great (theoretical) fuel economy, much better than its rivals, but a couple of noticeable flat spots under acceleration. Turned out Vauxhall had leaned the fuel maps at the exact engine revs that corresponded to 56mph and 75mph in top gear...

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#144

I've been following a multi-month discussion over in the r/electricvehicles subreddit about EPA range. There's a growing consensus that something is very wrong with it. Here are a couple of the articles that got some discussion in that sub: https://insideevs.com/news/407807/eletric-car-real-world-ran... https://www.caranddriver.com/reviews/a30874032/porsche-tayca... As someone who has owned both a Tesla Model X and o…

My understanding is that the Taycan was seriously screwed by having its track modes, which are genuinely very inefficient, blended equally in to the test.

It's a bit of a shame to see so many Tesla fans point to its supposed inefficiency based on the EPA range. It feels like the tables have turned 180 since the Top Gear scripted test days; it was shitty when Tesla was attacked with FUD back then and it's shitty when the Taycan is today.

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#145

Earlier quoted context omitted.

Unless you don't have a home...if you live in any dense area in an apartment, forget about it.

I actually live in a condo complex with 300 units and I get by. I just charge at the local library for free like once a week or at work.

How many charging stations does your library have?

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#146

I wonder how much of this will translate to real world driving. Teslas have generally significantly underperformed in real world range compared to EPA. This reads very much like they're optimizing more towards a benchmark.

If it's possible, every car maker can "optimize towards benchmark".

So is your theory that all car makers except Tesla are dumb and cannot optimize their range for EPA tests?

That they are morally superior to Tesla and will sacrifice sales by not optimizing for EPA range but some purported "real world range"?

And in what way exactly do you optimize for EPA test?

I've seen this "explanation" for superior Tesla results many times but somehow no-one actually explains how do you make a battery or electric motor or drag coefficient of the car that is optimized for EPA test but doesn't generalize to regular driving.

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#147
post #142
post #135

Earlier quoted context omitted.

Yes, this is why they have these tests attempt to do this in an apples to apples fashion, and the most scientific of these tests seem to show Tesla overestimates their EV range the most of any automaker.

Just to be clear: EPA tests the cars and calculates the range, not Tesla (or any other car maker). Therefore Tesla cannot "overestimate" EPA range. If you think that EPA range is not accurate, then you can blame EPA. And since you bring science, who are "they" and in what way their tests are more scientific that EPA's tests?

"Manufacturers test their own vehicles—usually pre-production prototypes—and report the results to EPA. EPA reviews the results and confirms about 15%–20% of them through their own tests at the National Vehicles and Fuel Emissions Laboratory.[6]"

https://en.wikipedia.org/wiki/Electric_car_EPA_fuel_economy

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#148
post #49
post #32

Earlier quoted context omitted.

In my experience: I manage to roughly match the EPA rating on the freeway driving at 65mph (it depends on the road, on the temperature, on how much stuff/people are in the car, etc.), but it goes down quickly as you drive faster. This table illustrates it fairly well: https://teslike.com/

I was pretty bummed to learn that my Model 3's "real" range was about 70% of the "rated" range depending on how the car was feeling. Tesla definitely creatively interprets range calculations.

I've had an s for 8 years (3 and 5 years in 2 cars) and driving at freeway speeds you'll use a lot more energy accellerating. On long trips I put my car on 65-75 dep on conditions and use the cruise. I get 90% of est range at least. Are you really accelerating a lot?

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#149

So it used to be rated at about 335mpc (miles per charge)? And 20% yanks it up to 402? That must be an incredible mass savings something like 10% I'm guessing, on a car that is already built on an all-aluminum unibody. I hope the NHTSA crash ratings are not affected!

335, then 370, and now 402.

Re: Model S Long Range Plus: Building the First 400-Mile Electric Vehicle

#150
post #146

I wonder how much of this will translate to real world driving. Teslas have generally significantly underperformed in real world range compared to EPA. This reads very much like they're optimizing more towards a benchmark.

If it's possible, every car maker can "optimize towards benchmark". So is your theory that all car makers except Tesla are dumb and cannot optimize their range for EPA tests? That they are morally superior to Tesla and will sacrifice sales by not optimizing for EPA range but some purported "real world range"? And in what way exactly do you optimize for EPA test? I've seen this "explanation" for superior Tesla results…

I mean they could be honest and still outperform the rest of the market. If what you say is true, the EPA metric is meaningless and they should report observed efficiency for a certain traffic pattern. Why lie about it?
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