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Mistawonders

Mistawonders

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Oct 8, 2024
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Hi everyone!

I’m sorry to disappoint you guys, but I don’t own a Fiat.
However, I DO own a Fiat Power Train engine, inside this lovely Alfa-Rosso Alfa Romeo MiTo of mine, which is none other than the equally partly hated/ loved 105HP Euro 6 TwinAir engine!
I’ve been extensively consulting the data on this forum, and decided to start contributing myself, so here I am!

Cheers!
 
Mistawonders said:
Hi everyone!

I’m sorry to disappoint you guys, but I don’t own a Fiat.
However, I DO own a Fiat Power Train engine, inside this lovely Alfa-Rosso Alfa Romeo MiTo of mine, which is none other than the equally partly hated/ loved 105HP Euro 6 TwinAir engine!
I’ve been extensively consulting the data on this forum, and decided to start contributing myself, so here I am!

Cheers!
Click to expand...
Ah that will be the 83HP engine Fiat pretended had different power outputs.... I jest (many a true word spokem jest). I was one of many diddled into buying the non existent 90HP Panda Waze which really cheeses me off.. Just today DVLA are now saying its a Waze 90 when there were none, EVER!

Not a lot of info on the engine, but its slowly building up with links to EPER and a very useful guide on changing the uniair unit. I love mine its really quite brisk on the one hand but can be economical if needs really must. It never feels like an 875cc two pot when you put your foot downand is an amzing tow car. I suppose if you have to drive something thats not a Fiat an Alfa is the next best thing LOL
 
The Panda Nut said:
Not a lot of info on the engine, but its slowly building up with links to EPER and a very useful guide on changing the uniair unit.
Click to expand...
Such as the fact that there is no traditional crankcase ventilation on this engine.

However, when you understand how the MultiAir/UniAir system functions, it’s quite a logical and clever system!

No breather to bring in air to compensate for vacuum inside the crankcase, there is no vacuum seeing as the Variable valve lift and timing lets air inside at different rates!

The only thing needed is a venting hose with an oil separator mesh to vent over pressure in the intake. A Venturi effect hose powered by the air sucked inside the turbo!

Still, it would have been better for FIAT to leave us with some information about the engine, instead of having to go through the reverse engineering process we all had to suffer to discover its intricacies.
 
Mistawonders said:
Such as the fact that there is no traditional crankcase ventilation on this engine.

However, when you understand how the MultiAir/UniAir system functions, it’s quite a logical and clever system!

No breather to bring in air to compensate for vacuum inside the crankcase, there is no vacuum seeing as the Variable valve lift and timing lets air inside at different rates!

The only thing needed is a venting hose with an oil separator mesh to vent over pressure in the intake. A Venturi effect hose powered by the air sucked inside the turbo!

Still, it would have been better for FIAT to leave us with some information about the engine, instead of having to go through the reverse engineering process we all had to suffer to discover its intricacies.
Click to expand...
A good point well made. Fiat are, as my daughter would say to me. A small pain in the derriere, a large pain in the bum, and / or A KING SIZED PAIN IN THE A***!
 
varesecrazy said:
My mito is only rated at 85,
but it's NOT as powerful as my punto TA, also an 85

What build date is your 105?
Click to expand...
It’s was first registered on April 2015. But it’s a 2014 make, Distinctive edition.
Same engine, same chassis, but not as powerful? Maybe a different weight ratio?
 
Ive had two 83hp Pandas and hte second has way more oomph than the first. The 2017 car seemed low on power and the 2019 feels well more than the rated output. You have to wonder at the differences being so obvious. I had 3 Renault Savannah 2.1dT. When I chnaaged for the last one they had 13 in a row run out jobs. I tried all of them and settled on the last one which turned out to have been damaged I think on the channel tunnel carriages. Oddly that was way way smoother running, but they all felt near the same in terms of power. It would be really interesting to know what was what. I read years back that the Peugeot XUD engines often ran way over the rated power and a 90hp could be as much as 110. Maybe they try different things using customers as guinea pigs and see what if anything occurs??
 
Last edited:
Mistawonders said:
It’s was first registered on April 2015. But it’s a 2014 make, Distinctive edition.
Same engine, same chassis, but not as powerful? Maybe a different weight ratio?
Click to expand...
My car's are both 2013, euro5

Yours would be Euro6 (due to date) , but I have no experience of the 105..

I swap cars with my son ( 3 months each..)

If we swap Punto to Alfa we are likely to stall the motor at low speed, it is definitely low on power (or the Punto is High..)
 
The Panda Nut said:
Ive had two 83hp Pandas and hte second has way more oomph than the first. The 2017 car seemed low on power and the 2019 feels well more than the rated output. You have to wonder at the differences being so obvious. I had 3 Renault Savannah 2.1dT. WHen I chnaaged for the last one they had 13 in a row run out jobs. I tried all of them and settled on the last one which turned out to have been damaged I think on the channel tunnel carriages. Oddly that was way way smoother running, but they all felt near the same in terms of power. It would be really interesting to know what was what. I read years back that teh Peugeot XUD engines often ran way over the rated power and a 90hp could be as much as 110. Maybe they try different things using customers as guinea pigs and see what if anything occurs??
Click to expand...
Probably the one they used for TV demos.;)
Some where I have a CD on tweaking the Peugeot XUD turbo engine to around 150Hp, basically adjusting injector pump and boost.
Supposedly identical vehicles can have widely differing performances, I have found that with two identical LDV vans, both ran sweet, but one went really well and was the most economical and the other was flat as a fa*t gutless.
 
Last edited:

bugsymike said:
Probably the one they used for TV demos.;)
Some where I have a CD on tweaking the Peugeot XUD turbo engine to around 150Hp, basically adjusting injector pump and boost.
Supposedly identical vehicles can have widely differing performances, I have found that with two identical LDV vans, both ran sweet, but one went really well and was the most economical and the other was flat as a fa*t gutless.
Click to expand...
Looks like manufacturers have issues with standardization management then…
 
varesecrazy said:
My car's are both 2013, euro5

Yours would be Euro6 (due to date) , but I have no experience of the 105..

I swap cars with my son ( 3 months each..)

If we swap Punto to Alfa we are likely to stall the motor at low speed, it is definitely low on power (or the Punto is High..)
Click to expand...

There’s a 40 Kg difference between both cars. Maybe this has influence on the drive feeling? The MiTo is heavier by the way.
 
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