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- #2,821
I've gone over this previously in this thread, but it's worth revisiting. The EPA's Tier 3 requirements have ratcheted more and more strict for corporate average emissions for NMOG+NOx each year since 2016, culminating in a final (extremely low) requirement for the 2025 Model Year.That engine in Evora trim has already gone through certification in the US, there should be no reason that a slightly detuned version will not. Whereas, there are currently no US emission certification on any version of the AMG I4.
Lotus qualifies as a Small Volume Manufacturer (SVM) which means they enjoy a "relaxed" spec for the NMOG+NOx limit at 51 mg/mi, but that''s still a very low figure. And it's one that the last iteration of the Evora (Evora GT, which was last sold in MY 2021) does not meet, it was tested for EPA compliance in Oct 2020 and returned a result over 70 mg/mi. To be specific, the NMOG+NOx tested at 72.9 mg/mi on the federal "average" fuel, and 82.2 mg/mi on the California formulation at 50degF. Those numbers were legal/OK in MY 2021 when the limit for SVMs was still 125 mg/mi, but they are no longer acceptable, the spec changed for SVMs to 51 mg/mi starting in MY22.
So either the Emira has to reduce measured tailpipe emissions by 30% compared to the Evora (which is unlikely), or they have to come up with another way to get the "fleet" average under the target. Which is why I suspect they have delayed the V6 for the US, so they can mix the AMG and V6 production numbers in the same model year to get a better fleet average.
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