If I took a 1L car for a drive, then took a 2L car for the EXACT same drive....

Reply 20

traintracks1995

3

Original post by Maccees

Along with all your other insights in other threads :rolleyes:

Those numbers came from a very well known equation. They weren't simply pulled from ones arse

Reply 21

Maccees

15

Original post by traintracks1995

Those numbers came from a very well known equation. They weren't simply pulled from ones arse

A well known equation that apparently already takes into account the million and one different variables that would affect the result?

Let's see it then.

Reply 22

traintracks1995

3

Original post by Maccees

A well known equation that apparently already takes into account the million and one different variables that would affect the result?

Let's see it then.

Fuel economy = Engine size ^ 0.333 * Delta

Reply 23

Maccees

15

Original post by traintracks1995

Fuel economy = Engine size ^ 0.333 * Delta

Talk me through it step by step please, using a 4 litre M3 as an example.

Reply 24

traintracks1995

3

Original post by Maccees

Talk me through it step by step please, using a 4 litre M3 as an example.

I'm afraid that there is no hope for you if you need that simple equation explained.

Reply 25

Maccees

15

Original post by traintracks1995

I'm afraid that there is no hope for you if you need that simple equation explained.

Stop sidestepping and just do it?

Reply 26

CurlyBen

19

Original post by traintracks1995

Fuel economy = Engine size ^ 0.333 * Delta

Go on then. Name the equation, derive it or post a link to a reputable site that quotes it. At the very least define each of the terms used.

Also bear in mind that efficiency tends to increase with engine size, hence why the Wartsila Sulzer RTA96C is one of the most fuel efficient internal combustion engines around despite displacing over 1,800 litres per cylinder - and it has up to 14 cylinders!

Reply 27

traintracks1995

3

Original post by CurlyBen

Go on then. Name the equation, derive it or post a link to a reputable site that quotes it. At the very least define each of the terms used.

Also bear in mind that efficiency tends to increase with engine size, hence why the Wartsila Sulzer RTA96C is one of the most fuel efficient internal combustion engines around despite displacing over 1,800 litres per cylinder - and it has up to 14 cylinders!