It signifies the the group of cars the epa tests were submitted for. In 2019 the test group was comprised of the LR AWD models and the Performance models however only a performance model was tested. The certificate indicates but doesn’t definitively prove the same method was followed.
I’m just extremely skeptical about the so called proof that the 990 is any less performant than the 980
the arguments I’ve heard so far are
the part number is different.
All that means is there’s a design change, they could use 4 bolts instead of 6 somewhere it could sit slightly higher to accommodate the lower ride height of the P etc nothing says the difference has to be related to its capability
the epa numbers.
So far I can find 0 evidence the P has ever actually even been tested. EPA numbers are all about “fuel efficiency” they’re looking at the whole car as a unit not measuring the efficiencies of individual components. If you buy a mustang that can be upgraded with a chip you don’t see the chipped numbers in the epa filing you see the numbers of the car as it rolls off the production line.
Elon says they’re physically different. I haven’t seen the quote or context myself but this can be both true and the motors still be equivalently performant. The motors could be slightly different designs with the same or similar specs
Nobody that I’ve seen has done any testing on the motors themselves. If someone was a spare 990 and 980 lying around send them over and I’ll do it myself and document the whole process.
but everyone who’s claiming with any certainty that the motors definitely are/are not capable of the same performance. Doesn’t understand the totality of the currently available information. And is making a lot of leaps and assumptions.
