Hello gentlemen, I have a question about Alfa Romeo Giulietta

Hello gentlemen, I have a question about Alfa Romeo Giulietta.
Let's say I have the 1.4 turbo engine, 120bhp.

What is the difference between the 1.4 120bhp and the Multiair 1.4 170bhp?

If it is just the Multiair feature, I read that it changes how the valves behave (I'm making it simple right now).

If the difference is just on the timing of the valves, would it be possible thru the engine control unit to change this parameter and get the 170bhp out of my 120bhp?

I really can't understand if there are any other differences components wise, besides the Multiair.

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correct me if im wrong but its basically variable valve timing so the construction of the engine will be different then a non VVT engine

I'm not a total expert on this so that's what I'm asking.

I thought that nearly everything in the engine was controlled by the ECU, so I was wondering if this was one of the parameters that could be changed in the ECU.

Would be nice if we got this car in the states.

We do, they just wrapped it in uglier sheet metal and called it a Dart.

The T-Jet is basically a 1.4 16v DOHC with a turbo attached.
The Multiair uses the same engine block but has electrohydraulic valve actuation that is controlled by the ECU.

It's basically what you said.

>I really can't understand if there are any other differences components wise, besides the Multiair.
The turbo is different.

But yes, you can get it remapped and get it to about 150hp safely.

Doesn't this thing have the same engine that the dart had?

Are they the same platform?

Same platform, ye. Bravo/Delta/Giulietta/Dart/200 share the same platform.

Although I think the Dart was only provided with the Multiair, not with the T-Jet.

Nope, the Giulietta uses a newer platform called FGA Compact while the other car you called are on the C Platform (stage C2)

C Platform: Bravo and Delta
Compact: Giulietta, Dart and 200

Same platform with substancial improvements.

No again, the FGA platform is a brand new platform and not just an evolution of the C platform.

That's also why calling it C Evo is wrong since it's totally new.

A common argument from anti FCA retards is to say that the Giulietta is the same rebadged car as the Bravo and Delta, but it isn't since they're on two different structures

Forgot the link: vehicledynamicsinternational.com/alfa_giulietta.php

so if I wanted I could install the electrohydrauillic valve system, I guess it should be a pretty much straight forward installation

I'm searching online if I find info about the turbo, something like different names but I can't find anything yet.

actually it is not electrohydraulic, it is just electric.
There's a solenoid that regulates the opening of the intake valves.


My point is, I thought that even in the TB (non-multiair) it was a solenoid regulating valve times, and not the "regular" springs

It's not just electric, it needs oil to operate the valves.
The solenoids only restrict the passage of oil so the valves can open/close accordingly.

Its not a Busso V6 so who cares

You are right. Apparently the "C-Evo" platform only shares the floor with the old one on which it was based.

>actually it is not electrohydraulic,
It is electrohydraulic. The hydraulics on the solenoids are controlled electronically.

>I guess it should be a pretty much straight forward installation
It's far from being "forward."
You're fine with the setup you have. If you want more power get it remapped. If you want even more get a bigger turbo and a bigger intercooler.
You do know that european Abarth 500s are T-Jet only, right? Same for the Abarth Puntos.

God smiles upon every Alfa Romeo engine

>You do know that european Abarth 500s are T-Jet only, right? Same for the Abarth Puntos.

actually I did not know, never cared too much about Abarth. I drove a 595 competizione and didn't like it tho.

My question was more curiosity than something I'd actually end up doing to the car.
But remapping it might be interesting.


Car runs just fine, I love it, but I'd like a little more torque for the mountain roads.


you can't imagine how much I'd love to try one

I can answer that question for you user.

The 120hp version is powered by a T-Jet engine which is essencially a FIRE 16V engine with a turbo. The crankshaft uses 9 mil bolts and is forged. This engine is the same as the 150hp through 180hp T-Jet, except for the camshafts, turbo and ECU.

Now the 170hp Multiair Turbo, is also a FIRE 16V engine, however it has the SOHC Multiair head and the regular cast 8mil crankshaft used in all FIRE engines. Same turbo as the T-Jet but completely different management. Camshafts do not change between multiair versions, but the ECU changes a great deal.

To improve power on your 120hp T-Jet you can just put on a better turbo (such as the Garrett GT14 unit used in the 180hp T-Jet and Multiairs) and have the ECU remapped. Should get the 180hp with decent reliability.

>t. FIRE specialist

My my, are you wrong. There are subtle but important differences between a T-Jet and a regular FIRE 16V. Namely, the crankshaft, block height, water pump, and a few other bits that add reliability to what is an outdated but very well designed lump.

thanks user.

I might try remapping it in the future, I got friends that did it already and I'll hear what they have to say.

How reliable are the T-Jets, really?
I'm looking for a shitbox with a little bit more bite than a 3k Civic and the Grande Punto with 1.4 or 1.6 looks pretty appealing but I don't know how the turbos hold up.
Especially since odo indications are pure fantasy in the slavland.
t. other person

Very reliable.

Reliable as any other FIRE engine desu. Expect 200k odd kilometers with no problems whatsoever. And simple maintenance after that.

So what engine does the North American Abarth use? T-Jet or Multiair?

In the USA they only have the Multiair. The T-Jet was never sold there.

How does the Multiair hold up reliability-wise compared to the T-Jet?

It's about the same thing. The engine is identical with minor changes to the head design to add the multiair valves, and very very reliable.

It's very reliable since the first "natural" defects have been fixed in the years since the M.air engines are on the market.

Just make sure to use the correct oil and it'll be flawless.

No, the Multiair system has different physical components (which are controlled differently, to suit). You could get a tune on your 1.4 Turbo, but you can't make it a Multiair.

Of course you can. You even have more stuff to tune.
To a basic level, even the multiair system is bound by mechanical constraints, which gives the possibility of fine tuning the timing. Not at all related to a VVT system.

I figured there would be more differences but didn't know specifically how many they were.
Thanks for the enlightenment tho.