BMW F10 Engine Range CO2

Django x2 · 22 May 2012 at 17:18

Why is there a difference between the SE and M sport CO2 ratings (and therefore mpg) for the same given engines across the new 5 series range. Is it tuned exhausts or something? I was never aware of this before and always assumed a 530d SE would be the same as a 530d M Sport or is it all based around ED?

Slumberbox · 22 May 2012 at 17:29

Might be that the m sport is heavier.

Housey · 22 May 2012 at 17:37

I've got an M Sport that'll be why

SDK^ · 22 May 2012 at 17:52

Strange one. All of the F20 variants have the same CO2

[TW]Fox · 22 May 2012 at 17:57

Wheels. Something I'd been wondering how BMW got away with for ages, especially given Mercedes have given different CO2 figures for different wheel sizes for some time now.

The wider your tyres the more fuel (and thus CO2 emissions) you use.

No wider rears on the SE's, and smaller base alloys too.

Django x2 · 22 May 2012 at 21:06

So if you bought an SE with optional 19" wheel upgrade, would the DVLA tax you differently?

[TW]Fox · 22 May 2012 at 21:09

Lucero said:
So if you bought an SE with optional 19" wheel upgrade, would the DVLA tax you differently?

I dont think it applies to options, so no.

Ev0 · 22 May 2012 at 22:21

SDK^ said:
Strange one. All of the F20 variants have the same CO2

They don't, the 120d SE has a lower CO2 rating than the sport/m sport/urban.

Django x2 · 22 May 2012 at 22:22

/Goes to buy an SE and source M Sport kit

Dr Who · 23 May 2012 at 07:06

[TW]Fox;21977716 said:
Wheels. Something I'd been wondering how BMW got away with for ages, especially given Mercedes have given different CO2 figures for different wheel sizes for some time now.

The wider your tyres the more fuel (and thus CO2 emissions) you use.

No wider rears on the SE's, and smaller base alloys too.

And the difference between economy tyres and UHP.

Lower the rolling resistance, better the economy and co2.

[TW]Fox · 23 May 2012 at 08:13

True but only the 520d ED has eco-tyres, the tyres used on the rest of the range are the same mix of Contisports, Michelins etc.

DaveyD · 23 May 2012 at 08:56

I imagine it'll be dependent on the weight of the vehicle / options selected / tyres / wheels etc that then influence the coast down characteristics of the car, which in turn fix what the resistance will be on the rolling road that they do the drive cycle on. It's all a bit of a con and BMW are very good at it