CX-5 2.5L 194hp vs 187hp engine differences?

[desere]

Hello
Is there a difference between the 194 and 187 hp engines?
Аnd above all, are there differences in the parts of the engine itself and the adjacent systems? Someone told me that the difference is only software, but why was this power reduction with software necessary.
Sorry if this has been discussed. I searched but didn't find it

 

[wlong01]

Some manufacturers do tunes so they can sell different versions of the same car with different options and different horsepower.
This is rampant in the computer industry where you can have the same exact machine but running at different MIPS. Of course, you have to pay more for more MIPS.

 

[sinistriel@]

If you are referring to the 194hp engine that has the EGR cooler there are quite a few differences, different cylinder head, exhaust camshaft, exhaust manifold, intake manifold which now contain tumble flaps, the egr cooler and the tune.

 

[desere]

If you are referring to the 194hp engine that has the EGR cooler there are quite a few differences, different cylinder head, exhaust camshaft, exhaust manifold, intake manifold which now contain tumble flaps, the egr cooler and the tune.

I'm not sure

Just when read about CX5 2018_2020 I read about 2 engines 2.5 194 and 2.5 187
And just want to know is there some big difference
Which is better and other information

 

[wlong01]

I'm not sure

Just when read about CX5 2018_2020 I read about 2 engines 2.5 194 and 2.5 187
And just want to know is there some big difference
Which is better and other information

Do you remember where you read it at? That's such a small difference in HP. Not like the turbo where it's 227hp with regular, add premium gas and it's 250 hp.

 

[desere]

I think i found the answer in wikipedia and other sites.
The fuel compression ratio in usa is 13:1 In Europe is 14:1
That is the reason for different hp

The reason for different compression is that the fuel in usa is 87_95 octane. Here in Europe is 95-100 octane

 

[HyFlyer]

If you are referring to the 194hp engine that has the EGR cooler there are quite a few differences, different cylinder head, exhaust camshaft, exhaust manifold, intake manifold which now contain tumble flaps, the egr cooler and the tune.

I say boooooo to that ... Too much added complexity for a 7hp gain. Kinda like the ASS technology for ~ 1ish mpg gain ... Not worth it (to me).

 

[HyFlyer]

... The reason for different compression is that the fuel in usa is 87_95 octane. Here in Europe is 95-100 octane ...

Different measurement systems in EU and USA.

RON Research Octane Number. (Used in Europe and elsewhere in gas stations)

MON Motor Octane Number.

AKI Anti-Knock Index. This is the number that is posted on the gas station in the USA as "Octane". It is derived as (RON + MON)/2

 

[cz5gt]

I think i found the answer in wikipedia and other sites.
The fuel compression ratio in usa is 13:1 In Europe is 14:1
That is the reason for different hp

The reason for different compression is that the fuel in usa is 87_95 octane. Here in Europe is 95-100 octane

not really. Its mostly mechanical not fuel related.
Suspecting there are some small differences, could be different head gasket , etc
but you are right in that they made the US one smaller due to the fuel and the fact people love to buy cheapest fuel . i.e 87 here.
In any case if you drive with 100 in europe it would be better for that engine.

btw there is a huge export market for US cars from auctions (mostly with small or larger damages) to Eastern Europe past years. What I always wonder is how people find parts after the fact. Lots of US cars have some variations of some parts and the European ones are often different.
Is it cheaper to maintain or may be the labor is less costly over the pond?

 

[desere]

not really. Its mostly mechanical not fuel related.
Suspecting there are some small differences, could be different head gasket , etc
but you are right in that they made the US one smaller due to the fuel and the fact people love to buy cheapest fuel . i.e 87 here.
In any case if you drive with 100 in europe it would be better for that engine.

btw there is a huge export market for US cars to Eastern Europe past years. What I always wonder is how people find parts after the fact. Lots of US cars have some variations of some parts and the European ones are often different.

Here is the same -most popular is the 95 The cheapest.
My mechanic told me sometimes to use 100 Shell V power to "clean" the engine parts.

 

[desere]

Different measurement systems in EU and USA.

RON Research Octane Number. (Used in Europe and elsewhere in gas stations)

MON Motor Octane Number.

AKI Anti-Knock Index. This is the number that is posted on the gas station in the USA as "Octane". It is derived as (RON + MON)/2

Still is difference
In USA regular \ lowest \is 87 USA which is 91 RON
In EU lowest is 95 RON wich is 91 USA
87 AKI = 91 RON

EU ratings are 95/98, which are equivalent to US ratings of 91/93.

That is why different compression ratio to can use 87 octane in USA

 

[MrViking]

Keeping in mind, of course, that using higher octane fuel in of itself does not equate to more horse power.

 

[cz5gt]

lets agree to disagree

 

[Mazdiod2]

I think i found the answer in wikipedia and other sites.
The fuel compression ratio in usa is 13:1 In Europe is 14:1
That is the reason for different hp

The reason for different compression is that the fuel in usa is 87_95 octane. Here in Europe is 95-100 octane

The ignition timing can be more advanced with higher octane fuel, but the higher compression ratio works in the other direction.
I get 84 octane here in Colorado, I guess the altitude (5000ft) allows this.

 

[youri]

There may be more to the story. I just went on the UK mazda website and I see that the 2.5 lt engine is rated at 194ps. Notice that it is in “ps” and not hp. Based on the article below, ps is also horsepower, but measured slightly differently. The article quote that 1 ps = 0.986hp. So that would mean that 194ps = 191hp. The remaining 4 hp difference maybe from the octane or something else, but that is really negligible.

The fuel compression in the UK is the same 13.1, not sure where wikipedia got the 14.1 mentioned above, but it doesn’t seem correct (for the CX-5 at least).

What's The Difference Between BHP, HP, kW and PS?

Manufacturers can often pick and choose between power units, so here's a low-down of what they all equate to

www.carthrottle.com

https://media-assets.mazda.eu/raw/upload//mazdauk/globalassets/uk/pdfs/fy159/p4/2.01.25/cx-5/mazda-cx-5-ps-guide-jan25.pdf?rnd=48ce75

 

[youri]

Also found out following the wikipedia link that the mazda 3 in North America has the 191 hp version of the 2.5L engine with a compression ratio of 13.0:1. So that removes both the octane and the compression ratio argument from the equation. The 191hp version of the engine is available in North America in a different model than the CX-5.

 

[desere]

I think the engine is same in 100%
Just some software tricks for some reasons

 

[sinistriel@]

Also found out following the wikipedia link that the mazda 3 in North America has the 191 hp version of the 2.5L engine with a compression ratio of 13.0:1. So that removes both the octane and the compression ratio argument from the equation. The 191hp version of the engine is available in North America in a different model than the CX-5.

Yes the 191hp engine in the 3 is the updated one with EGR and other changes, its also the same engine as the 140ps 2.5 that was just recently released in the EU. It is referred to as the PYUKD engine designation.