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Using the full battery (below zero) the 2021 Model 3 went 345+26 = 371 miles. Base price plus long range battery: $46,500. The 2nd highest range among the cars

Using the full battery (below zero) the 2021 Model 3 went 345+26 = 371 miles. Base price plus long range battery: $46,500. The 2nd highest range among the cars tested was the Taycan at 323 miles (no adjustment for past zero was offered in the article). Base price for Taycan 4S: $104,000. The story I'd like to understand is: Does the EPA actually publish results with one car underrated by 60% (Taycan 4S) and another overrated by 2% (2021 Model 3 LR)?

dragontamer 6y ago
> The story I'd like to understand is: Does the EPA actually publish results with one car underrated by 60% (Taycan 4S) and another overrated by 2% (2021 Model 3 LR)? My understanding is that in the USA: the manufacturers do the test and then report them to the EPA. So the Taycan numbers were tested and reported by Porche. In contrast, the Tesla numbers were tested and reported by Tesla. https://www.fueleconomy.gov/feg/how_tested.shtml https://www.fueleconomy.gov/feg/how_tested.shtml > Fuel economy is measured under controlled conditions in a laboratory using a series of tests specified by federal law. 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. Note: EPA only reviews the tests, not conduct them. The manufacturers self-test.
- avs733 6y ago
  or has certified labs test it. Interestingly, the tests are required to use a real human driver in a controlled test cell (a dynamometer). The driver has to keep the speed between two narrowly spaced lines ( a min and max - see their video) for something like 20 minutes. There is still a 3-5% fuel economy between the 'bad' and 'good' drivers or at least there was in 2003 when I toured one of these labs as an undergrad.
- 11thEarlOfMar 6y ago
  Any theory on why Porche would under-report by such a huge margin?
  - mannykannot 6y ago
    Maybe: 1) They don't want customers to be disappointed, even when the conditions are far from optimal. 2) Volkswgen AG... diesel...

dragontamer 6y ago

> The story I'd like to understand is: Does the EPA actually publish results with one car underrated by 60% (Taycan 4S) and another overrated by 2% (2021 Model 3 LR)? My understanding is that in the USA: the manufacturers do the test and then report them to the EPA. So the Taycan numbers were tested and reported by Porche. In contrast, the Tesla numbers were tested and reported by Tesla. https://www.fueleconomy.gov/feg/how_tested.shtml https://www.fueleconomy.gov/feg/how_tested.shtml > Fuel economy is measured under controlled conditions in a laboratory using a series of tests specified by federal law. 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. Note: EPA only reviews the tests, not conduct them. The manufacturers self-test.

avs733 6y ago
or has certified labs test it. Interestingly, the tests are required to use a real human driver in a controlled test cell (a dynamometer). The driver has to keep the speed between two narrowly spaced lines ( a min and max - see their video) for something like 20 minutes. There is still a 3-5% fuel economy between the 'bad' and 'good' drivers or at least there was in 2003 when I toured one of these labs as an undergrad.
11thEarlOfMar 6y ago
Any theory on why Porche would under-report by such a huge margin?
- mannykannot 6y ago
  Maybe: 1) They don't want customers to be disappointed, even when the conditions are far from optimal. 2) Volkswgen AG... diesel...