Comparing diesel and petrol consumption

Slideshowbob · 22-07-2013 1:53pm #1

Is it possible to compare as a rough guide?

I currently have a 1.6 petrol saloon, looking at a 2.1 diesel saloon.

What would equivalent consumption of 2.1 diesel be in a petrol engine? a 1.6, 1.8. 2.0?

Thanks

dgt · 22-07-2013 1:55pm

2.1? Merc or PSA?

Also depends on how it's driven and where

hi_im_fil · 22-07-2013 1:56pm

Could you not just look up manufacturers fuel consumption figures for your current car and whatever car you are looking at?

It's going to hugely depend on each individual car...

corkgsxr · 22-07-2013 2:13pm

hi_im_fil wrote: »

Could you not just look up manufacturers fuel consumption figures for your current car and whatever car you are looking at?

It's going to hugely depend on each individual car...

True the equivalent petrol to my old 2.4 non turbo diesel I recon is about a 6.3 petrol

Slideshowbob · 22-07-2013 9:27pm

Merc 2.1 diesel

It's 09

Old car is 1998!

MuppetCheck · 22-07-2013 9:31pm

Spiritmonitor.de is worth a look. You can compare cars there.

NuckingFacker · 22-07-2013 9:31pm

Slideshowbob wrote: »

Merc 2.1 diesel

It's 09

Old car is 1998!

You'll get 8mpg more and pay 10k for the priveledge.:)

CiniO · 22-07-2013 9:40pm

Slideshowbob wrote: »

Is it possible to compare as a rough guide?

I currently have a 1.6 petrol saloon, looking at a 2.1 diesel saloon.

What would equivalent consumption of 2.1 diesel be in a petrol engine? a 1.6, 1.8. 2.0?

Thanks

Do you really think that fuel consumption is linear to engine size?

biko · 22-07-2013 9:48pm

As said, you have to find the reported mpg for the car you are looking at.
There isn't afaik any easy relation you can use to predict mpg based solely on engine size, at least not in a predictable way for all cars.
Various engine sizes will have different bhp, turbo or not, and be in various weights of cars.

www.fuelly.com/car/ is good as it reports actual customer's mpgs. There also plenty of other resources online.

650Ginge · 23-07-2013 8:27am

MuppetCheck wrote: »

Spiritmonitor.de is worth a look. You can compare cars there.

Definitely the way to go. If you know what you get in you current car look it up first and see if where you fall on the range of results for your current car and driving style. So if you are on the average you will probably get the average for the other car.

Tea 1000 · 23-07-2013 10:40am

Slideshowbob wrote: »

Merc 2.1 diesel

It's 09

Old car is 1998!

You can't really compare engine size to engine size when comparing fuel consumption. A Mitsubishi Evo 9 is a 2 litre petrol engine that'll probably do around 20mpg, a Lexus GS450h is a 3.5 litre petrol engine with a hybrid system that'll do 47.9mpg in the latest model!
Given that your Mercedes is a 2009, it might be a Blue Efficiency engine. That'll get another 5mpg or so over the previous versions (in certain circumstances). What is it? C200? C220? E220?
What was the 1998 car?

Comparing diesel and petrol consumption

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