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M40i CO₂ emissions

Discussing the current generation Z4
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Swiftly
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M40i CO₂ emissions

Post by Swiftly » Thu Apr 20, 2023 9:33 pm

I am wondering if any one can explain why the 2023 LCI M40i model CO₂ emissions is rated at 184 g/km where as my previous 2019 M40i CO₂ emissions was only 168 g/km. I am wondering if BMW have reduced some of the stuffing out of the exhaust system, since I have noticed that the exhaust sounds much deeper and is more throaty than the 2019 model, and which might account for the increase in emissions rating?
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Replacement, G29 Z4 M40i Lci in Alpine White :wub:
Gone G29 Z4 M40i in San Francisco Red
Gone F22 M240i auto coupe in Estoril Blue
Gone 2007 E85 3.0si Sport in Silver Grey,

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M40i CO₂ emissions

Post by B21 » Thu Apr 20, 2023 9:55 pm

Figures are broadly similar ..different certification basis in 2019 vs 2023 but close enough

For M40i

2019 EU6-LD temp 191-192
2023 WLTP 184-183
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M40i CO₂ emissions

Post by Swiftly » Thu Apr 20, 2023 10:10 pm

B21 wrote: Thu Apr 20, 2023 9:55 pm Figures are broadly similar ..different certification basis in 2019 vs 2023 but close enough

For M40i

2019 EU6-LD temp 191-192
2023 WLTP 184-183
So the deeper exhaust sound is just one of many minor differences that I have noticed between the 2019 and the 2023 LCI models
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Replacement, G29 Z4 M40i Lci in Alpine White :wub:
Gone G29 Z4 M40i in San Francisco Red
Gone F22 M240i auto coupe in Estoril Blue
Gone 2007 E85 3.0si Sport in Silver Grey,

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M40i CO₂ emissions

Post by Pondrew » Thu Apr 20, 2023 11:23 pm

Swiftly wrote: Thu Apr 20, 2023 9:33 pm I am wondering if any one can explain why the 2023 LCI M40i model CO₂ emissions is rated at 184 g/km where as my previous 2019 M40i CO₂ emissions was only 168 g/km.
I thought everybody knew.....white cars are much less eco-friendly than red ones. It's a sure-fire fact. :D

PS It may have something to do with change in fuels too. E5, etc! :?

PPS Just noticed the 'official figure' (which means absolutely nothing as it's a desktop calculation) is exactly 10% higher. Strange? :?
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
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M40i CO₂ emissions

Post by Pondrew » Thu Apr 20, 2023 11:42 pm

Pondrew wrote: Thu Apr 20, 2023 11:23 pm was only 168 g/km.
ONLY 168g? 168 grams of a gas is a LOT of gas. And that's per km, not mile.
For every 1,000 miles at 184g/km you are pumping out nearly a 1/3 tonne of CO2. So much for kerbing global warming! :thumbsup:
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

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M40i CO₂ emissions

Post by Swiftly » Fri Apr 21, 2023 6:35 am

Pondrew wrote: Thu Apr 20, 2023 11:23 pm
Swiftly wrote: Thu Apr 20, 2023 9:33 pm I am wondering if any one can explain why the 2023 LCI M40i model CO₂ emissions is rated at 184 g/km where as my previous 2019 M40i CO₂ emissions was only 168 g/km.
I thought everybody knew.....white cars are much less eco-friendly than red ones. It's a sure-fire fact. :D
So that's what it is :lol:
Image
Replacement, G29 Z4 M40i Lci in Alpine White :wub:
Gone G29 Z4 M40i in San Francisco Red
Gone F22 M240i auto coupe in Estoril Blue
Gone 2007 E85 3.0si Sport in Silver Grey,

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M40i CO₂ emissions

Post by q96169we » Fri Apr 21, 2023 5:14 pm

I remembered the CO2 rating method changed between when I ordered my G31 and when I took delivery of it. It's exactly same car but CO2 is about 20g/km higher. The car was ordered in March 2020 and delivered in May 2020 so your 2019 vs. 2023 might be due to the same reason.

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