Got simple question. My parents and also wife parents are living in some distance from our home. Currently we have big limousine that carry us nicely to them at constant speed of 140km/h trough highway sometimes even little faster. My question is what range would be that on base Model 3?

Pawel, welcome to the site! While your question is simple for sure unfortunately no one has that kind of detail yet.

Well, Pawel, this site would be nothing without speculation , so here is what my educated guess would be (from driving a Nissan LEAF since 2011 and a Tesla S since 2013...I would say that a full charge with the standard battery in a Model 3 traveling at 87 mph would probably get in the neighborhood of about 175 miles of range, based on speed alone. Going uphill could reduce that even more...

Take the chart below (based on EPA data) and extrapolate for your use case scenario. Those number are for M3LR so I would estimate M3SR around 275 wh/mile. This gives an estimated range of 192 miles. I suspect real world will be close to 175 at that speed.

What is funny about these curves is, they must cap out at certain speeds and then flatter completely. I'm not sure if that is the case for electric, vs. regular gas consumption engines. For example, my 2001 CLK430 would get 21-26 mpg, basically city vs. highway. On the highway, at 75, it would do about 24 mpg. on the highway over distances at 150 (mph), it would do 22-23 mph. HARDLY a dramatic increase in consumption of fuel for the 2x increase in velocity. I could never find anyone in engineering who could explain it to me. Same for my bmw 750il.. I'd get low 20's on highway at regular speeds, but only fall to 18/19 consumption when traveling 150-160 over long distances... makes no sense. Is electric just different and a clear linear curve as speed continues to climb?

Where the heck were you traveling at 150 mph over long distances? Since you are near me, I just want to be warned.

I have noticed similar results on my Chevy Volt. For instance, at 72 mph on a very hot 115-degree day, I get only about 31 miles of range, down from 53 EPA miles. On the same trip and same conditions, running gas in charge sustaining mode, I get 35 mpg, down from 42 EPA mpg. So under the same conditions, gas gives me 83% of EPA rated miles and battery gives me only 58% of EPA rated miles. I'm at a loss for an explanation as well.

I always assumed the rpm of an EV motor started to have a significant impact after some point, and since EVs typically have a single reduction gear, this is why the efficiency seems to drop off faster than you'd expect due to only drag effects. However, I could be wrong about that, but most ICE engines do have the benefits of gearing...

ALL cars' efficiency drops off with speed thanks to wind resistance. https://physics.stackexchange.com/q...ph-optimal-for-gas-mileage-of-a-passenger-car

If this is true, this means that your car's rolling resistance, drivetrain and ancillary losses are all horribly huge. Normally, aerodynamic losses are the largest contributor to decreased fuel mileage with speeds above 80 mph. There is no way to get around the huge amount of power required to keep a vehicle traveling at those high speeds (assuming earth's atmosphere). So your data is highly suspect.

yeah one would think so. trust me, I put the data into spreadsheets and tried several times to have product explain it to me. there are no real answers. but the clear point, is that the curve above doesn't apply at all. In my example, with a clear DOUBLING of speed, I should see a HALVING of mpg.. that in no way was the case. Closer to 10% reduction was the norm.

Physics laws are just that, laws. You can't get around the increase in aerodynamic losses encountered with 150 mph speeds.