engine terminology

[LukeManic]

just after some info plz. Its really buggin me and ive tried to look around the net and have found some answers to my questions.

I want to know what the 1.2, 1.4 etc means in terms of a car engine. It might sound dumb question to some, but i'd like a helpful answer.

Also the 1.5TD Isuzu engine: how many cylinders/valves does this engine have?

Thanks.

[smithy87]

I want to know what the 1.2, 1.4 etc means in terms of a car engine. It might sound dumb question to some, but i'd like a helpful answer.

As far as this aspect of your question is concerned, here's my shot at it....

1.0, 1.2, 1.3 etc is the power displacement of the engine.

For example, my 1.3 is actually a 1297cc engine (cc is Cubic Capacity), so the 1.2 engine which is actually 1124cc has a smaller power displacement compared to the 1.3, therefore the 1.3 is a more 'powerful' engine. The bigger the number, the better :twisted:

Hope that helps/makes sense 8)

[burgo]

right the 1.5td izuzu has four cylinders and 8 valves. as for the 1.2,1.3 stuff that is just the cc of all four cylinders, this number is usually rounded up or down though. as to bigger= better that all depends what your after i spose.

[LukeManic]

hmmm, 'power displacement' in what way? Sorry i want to get my head round this.

I mean 1.2 litres etc y talk in litres? something to do with the amount of fuel that is burnt in a certain amount of time?

Thanks again

[burgo]

1.2l is the amount of swept volume in one cycle of the engine

in other words the volume of one cylinder is the space between the top of the cumbustion chamber and the piston when it is rite at the bottom of its stroke, so to get the total cc you add all four together

[Stuart]

ignore that "power displacement" stuff.

as burgo has said its the engine capacity in litres (the yanks use cubic inches) and what it is, is the ammount of air/fuel mix the engine could pull in if all 4 cylinders were filled at once.

the ideal ammount of fuel burnt is 14.7:1 by mass (eg 14.7 grams of air to one gram of fuel) or in volume terms its approx 1000Kg of air is required to burn 1Kg of fuel.

www.max-boost.co.uk is a very very good site to learn about engines etc but does get a bit indepth lol

anymore questions just ask

[LukeManic]

guys that is a great help and well explained.

thanks again :)

[Jack]

1.2 engine which is actually 1124cc has a smaller power displacement compared to the 1.3, therefore the 1.3 is a more 'powerful' engine. The bigger the number, the better :twisted:
1.2 is 1196cc, 1124cc would be a 1.1

My 12NV was faster than my mates 1.3SR... Power to weight IMO is more important than just sticking a bigger engine in.

...says he who has the car that weighs almost a ton and a half lmfao

[Snowface]

For example, my 1.3 is actually a 1297cc engine (cc is Cubic Capacity),

Hope that helps/makes sense 8)

cc means Cubic Centimetres, not Cubic Capacity.

1 Cubic Centimetre (cc) = 1 Millilitre (ML)

1000 Millilitres = 1 litre

[_JH_]

If you are serious about learning more about engines and cars, I'd recommend 'Fundamentals of Motor Vehicle Technology' by Hillier and Pittuck.

I've found the 1993 edition on Amazon:

http://www.amazon.co.uk/exec/obidos/ASIN/0748705317/qid=1113590091/sr=1-1/ref=sr_1_11_1/026-0316459-9955669

It seems to be the latest (mine is the 1972 edition lol).

They have/are publishing a few new versions this year which can be seen on amazon but I haven't seen these.
The one above contains everything in one book, I suspect the newer ones are the original split up into different books.

Hope that is of some use.