What increase/decreases fuel consumption?

Dolby

Dolby

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Engine capacity?
Power?
Engine speed?
 
Dolby said:
Engine capacity?
Power?
Engine speed?
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I can just assume that it would be based on a couple of factors.

Strain put on the engine (Steep incline/pay load)
Capacity
Power
Engine speed (revs per minute)

I think the list is pretty endless
 
Doesn't matter what I do in the Yaris T1...the petrol lasts a month!
 
#1 factor in fuel consumption: your right foot.

A BMW M3 can be more fuel efficient than a Prius, as demonstrated by JC. But plant your right foot, and even a Prius will be a petrol-guzzler.

A small capacity engine is great for city driving, but not long distance driving. The reverse is true for a big capacity engine.

Diesels are far more economical than petrol cars.

Newer cars are more fuel efficient.

A clean car is more fuel efficient.

Aircon off.

Don't accelerate and brake, rather keep a steady speed and coast to the stop sign/robot.

Don't accelerate uphill, and coast in highest gear downhill.

this one is NOT recommended: draft as much as you can, it makes a big difference in consumption.
 
Naks said:
#1 factor in fuel consumption: your right foot.

Don't accelerate and brake, rather keep a steady speed and coast to the stop sign/robot.

Don't accelerate uphill, and coast in highest gear downhill.
Click to expand...

I do exactly the opposite... i know my driving style is very bad because i have to change my brakes very often, and fuel consumption as well(well before i had a citi and now i have a 4L wrangler that's need a very light right foot, but the sound and the power is worth that extra litres)...:D

i don't even know exactly what i get... anything from 14L to 17L per 100km:eek:
 
Naks said:
#1 factor in fuel consumption: your right foot.

A BMW M3 can be more fuel efficient than a Prius, as demonstrated by JC. But plant your right foot, and even a Prius will be a petrol-guzzler.

A small capacity engine is great for city driving, but not long distance driving. The reverse is true for a big capacity engine.

Diesels are far more economical than petrol cars.

Newer cars are more fuel efficient.

A clean car is more fuel efficient.

Aircon off.

Don't accelerate and brake, rather keep a steady speed and coast to the stop sign/robot.

Don't accelerate uphill, and coast in highest gear downhill.

this one is NOT recommended: draft as much as you can, it makes a big difference in consumption.
Click to expand...

I have to disagree on this one mate...in my experience with my 147's 2.0, it used a lot of petrol when the engine was replaced at 50k because previous owner hit sump and carried on driving...but the engine was replced with brand new one from factory and it used mor than 10l/100km's...now its down to 8.0-8.5l/100km
 
koeks said:
i don't even know exactly what i get... anything from 14L to 17L per 100km:eek:
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Jah, but u're not supposed to be using a Jeep to commute :rolleyes:

Says me who commutes in a Disco2 Td5. I drive 50km every day, I put 30L of diesel each week and get 250-260km, sometimes even 275km. So consumption is between 11-12l/100km. After the 160Kkm service last month, it dropped to 10.5 for one week :eek:


ALFAHOLIC said:
I have to disagree on this one mate... the engine was replced with brand new one from factory and it used mor than 10l/100km's...now its down to 8.0-8.5l/100km
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It's a general rule. But in your case, if the 'new' engine is consuming more than the old one, I would look into it. Could be that it's not opened up yet, but still, something does not sound right.
 
Naks said:
It's a general rule. But in your case, if the 'new' engine is consuming more than the old one, I would look into it. Could be that it's not opened up yet, but still, something does not sound right.
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Ya, when it reached 20 000kms it just got right...lol typical Alfa...fixes itself:D
 
PythonFSi said:
Don't forget, your tyres play an important role in fuel saving as well.
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Thanks PythonFSi, I forgot about that.

There's a whole bunch of new 'greener' tyres coming out now. They have reduced rolling resistance, which means they don't require as much energy to move.

If you need new tyres, probably a good idea to get these instead of your typical aggressive treads?
 
PythonFSi said:
I see you're starting again with this PRAISE-ALFA comments! :D

They gonna k@k on you again! You've been warned!
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Dude lol - I'm allowed to say how I feel about alfa...ok, let's stop this...hows your'e alfa btw?:eek:
 
You guys have answered, thanks - but it was fuel saving as such ;)

Take the big, America 5.6 V8 engines pushing out a modest 250KW - and a new SL55 pushing out 370KW. Engine is very similar - but output is 50% greater on the merc. Under the same driving conditions - who'd get the better consumption?

Or a Audi A3 2.0T and Audi A3 2.0T - capacity, but 30% more power.

Then a 1.6 Vtec (118KW) revving constantly to 6,000rpm and a previous shape Audi A3 1.8T (110KW). Similar power, but the turbo would be effortless to drive and probably spin at half the rate.
 
Dolby said:
You guys have answered, thanks - but it was fuel saving as such ;)

Take the big, America 5.6 V8 engines pushing out a modest 250KW - and a new SL55 pushing out 370KW. Engine is very similar - but output is 50% greater on the merc. Under the same driving conditions - who'd get the better consumption?

Or a Audi A3 2.0T and Audi A3 2.0T - capacity, but 30% more power.

Then a 1.6 Vtec (118KW) revving constantly to 6,000rpm and a previous shape Audi A3 1.8T (110KW). Similar power, but the turbo would be effortless to drive and probably spin at half the rate.
Click to expand...

I think you can't discount the efficiency of the engine itself. Some engines utilise the energy within the fuel more effectively than others, so it's not really worthwhile trying to make the Yank V8 vs Merc comparison. That being said, I'd wager that the merc engine is more efficient.
 
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