It is unfortunate that the Monroney sticker above doesn't show the option packages clearly. It's all very confusing to me that there is a window sticker but no way to see what it contains on fueleconomy.gov. But in any case, we need to be aware that the exact option packages included on a vehicle have a huge impact on their range (as much as 10%). We have no idea what option packages we're comparing here. No matter what, the vehicle is fantastically inefficient - just something to keep in mind when you hear reports from Taycan owners about how far they have been able to drive relative to the EPA - you may not know what their projected range actually was for their specific configuration. It's a variable that has to be known to draw conclusions.
Since I discovered this yesterday for the 3P efficiency numbers, I went ahead and looked up Porsche. Looks like they only have provisional permission to sell the Turbo S in California.
They need to redo the software and try again (presumably to actually get the promised number???). See the last paragraph of the Executive Order linked below.
CARB said:
certified conditionally on the manufacturer providing all-electric range data for the Taycan Turbo S with the revised control software
Keep in mind: These are UDDS (Urban Dynamometer Driving Schedule) numbers. So this is the city part of the driving cycle only.
Multiply by 0.7032 to understand how it will reflect to EPA City Efficiency (this is the 2-cycle to 5-cycle ratio), and as far as overall efficiency, EPA is a 43/57 weight of city/highway results.
So, the Porsche Taycan is right around 282 miles (both models about the same). For reference, the 2020 Model 3 Performance Stealth (not a comparable vehicle...) achieved 487 miles on this same test cycle.
Model S Performance on 21" gets 437 miles. Lol.
So 282 * 0.7032 = 198 miles city cycle scaled. It's not clear whether this result will align with the window sticker above. If it does, it means that highway must be considerably lower efficiency (to get to 192 weighted). But that doesn't really follow from that window sticker (highway is better). So it makes me think that window sticker may be impacted by option selection and represents a possible "worst case" - it is a quite expensive configuration so who knows on the wheels and tires (the most significant factor for efficiency).
Current Porsche Taycan Turbo/Turbo S, revision 1 (last paragraph):
https://ww3.arb.ca.gov/msprog/onroad/cert/pcldtmdv/2020/porsche_pc_a0190275r1_0_z_e.pdf
Original version (cancelled, missing the last paragraph):
https://ww3.arb.ca.gov/msprog/onroad/cert/pcldtmdv/2020/porsche_pc_a0190275_0_z_e.pdf
2020 Model 3 AWD:
https://ww3.arb.ca.gov/msprog/onroad/cert/pcldtmdv/2020/tesla_pc_a3740031r1_0_z_e.pdf
Model S:
https://ww3.arb.ca.gov/msprog/onroad/cert/pcldtmdv/2020/tesla_pc_a3740028_0_z_e.pdf