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General engine differences

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General engine differences

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rogs

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Nov 11, 2006
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can anybody explain to me how i can tell the difference between the 8v 110bhp engines and the 16v 110bhp engines and why they have 8v and 16v, was one newer than the other? is one better than the other? ive noticed that the facelift models 54 onwards have a round gear knob, does this denote anything? the reason i ask is im looking for a newer model to my 2001 scudo and when i bought mine i thought it was a 110bhp being a JTD but ive since been told its a 95 bhp model, im confused! :confused:
Thanks in advance
 
paddy328i said:
Im afraid there is usually very little help to be found on this forum
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The help available on this forum is usually based on other peoples past experiance and is therefor useful information that would not be available elsewhere. Many people on here take a lot of time and care which in turn saves others recieving large garage bills. When there is no reply to a post it's because others are not sure of the answer and don't want to provide missleading information. If the best you can do is reply with a quote like this then I suggest you go elsewhere. The moderators of this forum spend a lot of time and effort keeping it in tact, allowing us to have the privelage of information from others. If you cant show appreciation for that, LEAVE!!!
 
paddy328i said:
Im afraid there is usually very little help to be found on this forum
Click to expand...

That's a bit unfair.

Advice is given (and freely) when it is available. Unfortunately it's almost impossible to know everything about the range(s) of vehicles in this section. Whatever I DO learn about mine I pass on when someone asks for it - as do other regular contributors.

Your posting of the manual on Rapidshare is acknowledged and greatly appreciated. Every contribution helps and, in time, we might get a reasonable database of advice that everyone can access.
 
bigdong said:
The help available on this forum is usually based on other peoples past experiance and is therefor useful information that would not be available elsewhere. Many people on here take a lot of time and care which in turn saves others recieving large garage bills. When there is no reply to a post it's because others are not sure of the answer and don't want to provide missleading information. If the best you can do is reply with a quote like this then I suggest you go elsewhere. The moderators of this forum spend a lot of time and effort keeping it in tact, allowing us to have the privelage of information from others. If you cant show appreciation for that, LEAVE!!!
Click to expand...

Hear Hear. Well done that man.
 
it appears to be the 2004 onwards 2.0 common rail turbo diesel JTD vans have the round gearknob and the lesser powered 1.9 engines have the other style gearknob
 
rogs said:
can anybody explain to me how i can tell the difference between the 8v 110bhp engines and the 16v 110bhp engines
Click to expand...

Can't you see anything through the filler cap in the cam cover?

I will go & have a look at mine, also at the VIN plate if no-one comments soon.
 
rogs said:
can anybody explain to me how i can tell the difference between the 8v 110bhp engines and the 16v 110bhp engines and why they have 8v and 16v, was one newer than the other? is one better than the other? ive noticed that the facelift models 54 onwards have a round gear knob, does this denote anything? the reason i ask is im looking for a newer model to my 2001 scudo and when i bought mine i thought it was a 110bhp being a JTD but ive since been told its a 95 bhp model, im confused! :confused:
Thanks in advance
Click to expand...

Listen, I'm no expert when it comes to engines but have good engineering knowledge.

I'd be surprised if the 8v and 16v have the same bhp. Where did you get this info?

Bhp, I believe, is measured at the flywheel. So if you have an engine with twice as many valves pushing the camshaft, you're bound to get more power.

Also with double the valves, you are likely to get better torque, smoothness and general efficiency.

So 8v = less power
16v = more power, better torque and better fuel efficiency.

I wouldn't focus too much on the different gear stick knobs.
 
I was always under the impression the 2.0 JTD engine was manufactured in two versions, 8v which produces 85bhp and 16v which produces 110bhp.

Unfortunately mine is an 8v version and as I want to tow a caravan with a load in the back to attend trade shows it looks like I will have to sell it and purchase something more powerful.
 
handyal said:
I was always under the impression the 2.0 JTD engine was manufactured in two versions, 8v which produces 85bhp and 16v which produces 110bhp.
Click to expand...

Perhaps no-one's got an "Owner Handbook". Do not despair, handyal - I have.

So - "Technical specifications":

"
Engine Marking

The engine marking is printed on a plate connected to a ring on the cylinder block. It includes the type code and the serial number".


Model Plate

Plates are applied to the right-hand door frame.

Plate 1
A Manufacturer's name
B Vehicle/version Identification Number
...
H Serial Number

Plate 2

I M/F name
M Max Gross
N Max Gross with trailer
O Max weight front axle
P Max weight rear axle
Q Vehicle Type ID Code
S Serial #.
"

Engine Code:

RFN = 2.0 JTD 16v = 136HP@6,000 RPM (THIS IS PETROL!)
WJY = 1.9D = 69 HP@4600 RPM
RHX = 2.0 JTD 8v = 94@4,000 RPM
RHZ = 2.0 JTD 8v = 109@4,000 RPM
RHW = 2.0 JTD 16v = 109@4,000 RPM


handyal said:
Unfortunately mine is an 8v version and as I want to tow a caravan with a load in the back to attend trade shows it looks like I will have to sell it and purchase something more powerful.
Click to expand...

If it's *95* HP, go slower. There does not appear to be an 85 HP model.
 
Bossman74 said:
Listen, I'm no expert when it comes to engines but have good engineering knowledge.

Bhp, I believe, is measured at the flywheel.
Click to expand...

No, it isn't. It's measured at the "brake", i.e. the wheel.


Bossman74 said:
So if you have an engine with twice as many valves pushing the camshaft, you're bound to get more power.
Click to expand...

The valves do not "push the camshaft". It's the other way around.


Bossman74 said:
Also with double the valves, you are likely to get better torque, smoothness and general efficiency.

So 8v = less power
16v = more power, better torque and better fuel efficiency.
Click to expand...

The relationship between valves and what happens is complex, and depends on RPM as well as other factors. These vans (mostly) have a turbocharger, which obscures the relationship considerably more.
 
Zog said:
No, it isn't. It's measured at the "brake", i.e. the wheel.




The valves do not "push the camshaft". It's the other way around.




The relationship between valves and what happens is complex, and depends on RPM as well as other factors. These vans (mostly) have a turbocharger, which obscures the relationship considerably more.
Click to expand...

Don't know how you multiquote so will respond to each point.

1. I stand corrected, however, bhp at each flywheel would still vary from the 8v to 16v version.

2. OK, I confused the pistons with the valves and the crankshaft with the camshaft. After further investigation, the 16v version has separate valve for intake and another one for exhaust expulsion whereas the 8v version has one valve doing both. However, the conclusion is still the same, more power and efficiency.

3. Regardless of relationship, 16v = more power.

Therefore, my point was confirmed.

By the way, if you know so much, why didn't you contribute earlier, instead of correcting someone who felt compelled to help when others with knowledge wouldn't?
 
Bossman74 said:
Don't know how you multiquote so will respond to each point.

1. I stand corrected, however, bhp at each flywheel would still vary from the 8v to 16v version.

2. OK, I confused the pistons with the valves and the crankshaft with the camshaft. After further investigation, the 16v version has separate valve for intake and another one for exhaust expulsion whereas the 8v version has one valve doing both. However, the conclusion is still the same, more power and efficiency.

3. Regardless of relationship, 16v = more power.

Therefore, my point was confirmed.

By the way, if you know so much, why didn't you contribute earlier, instead of correcting someone who felt compelled to help when others with knowledge wouldn't?
Click to expand...

Man, I'm such a div. Sorry, each valve still has an intake and still expels exhaust. But with more valves, the greater the intake and the greater the expulsion i.e. more power
 
Actually the definition of BHP is meaningless unless it's noted as to WHERE the BHP is being measured at.

It can be at the flywheel or (more commonly) at the wheels but, like I say, if it isn't stated as such it cannot be assumed.
 
Bossman74 said:
Don't know how you multiquote
Click to expand...

As far as I know, the only way to do it is to "Quote", then cut'n'paste the QUOTE=zzzz;nnnn and /quote where you want them (with square brackets, try it & see).


Bossman74 said:
By the way, if you know so much, why didn't you contribute earlier, instead of correcting someone who felt compelled to help when others with knowledge wouldn't?
Click to expand...

Because AFAIR no-one had requested an explanation of all this stuff - just what engine does what.

I can't find the elusive "engine marking" on my van. Do you know where it is? Knowing what the "markings" mean without knowing what they are is not very useful.
 
Bossman74 said:
each valve still has an intake and still expels exhaust. But with more valves, the greater the intake and the greater the expulsion i.e. more power
Click to expand...

Each valve normally either lets stuff into the cylinder, or lets it out. With 4 valves per cylinder, two let stuff in, and two let stuff out. They don't do both. The valves of course can be different sizes, and combustion chamber design as well as the design of the intake and outlet, together with various devices before or after the valves, all work together to change things. It's not that simple. It can be, for instance, that two valves per cylinder are actually better than four, at different RPM.

However, all this isn't helping handyale!
 
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