TFSI vs. TSI: What's the Difference?

Hi.

The "UR TSI" was a 1.4-liter engine with both a turbocharger AND a supercharger, producing either 140 or 170 horsepower.
The 90 kW 1.4 TSI is now just a turbocharged engine.

The 116 kW 1.8-liter engine is ???

Has Volkswagen buried the roots supercharger again?

m;
He's wondering what he would buy if he were looking for a gasoline-powered car.

dieselmartin wrote:

... He is wondering what he would buy if he were looking for a gasoline-powered car.

Certainly not an FSI engine, as converting it to run on LPG is very difficult and is currently still in the experimental stage.

The 1.8 TFSI engine (engine code: BYT, BZB) does not have a supercharger.

SGM

I meant the "1.8 TSI" engine, which is now available in the Passat 3C.

Is that the BYT or the BZB?

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

I only found the 1.8 TFSI engine with the above-mentioned part numbers in the parts catalogs (SSPs).
I seem to recall that it's always written as "TSI" anyway, regardless of whether it has twin charging or not.
They already discontinued the 1.4 TSI engine with 122 horsepower.

SGM

Hello,

Why would you need a turbocharger? The 1.8-liter engine has more torque (250 Nm) from as low as 1500 rpm than the 1.4-liter engine with 170 horsepower.

Best regards,
Albrecht

Well...

The advertised values are likely all statically "determined" or "obtained."

Let's talk about the 1.9 TDI with 105 horsepower and the 2.0 TDI with 170 horsepower.
There are two values: 240 versus 350 Nm.

But then you give it some gas at 1100 RPM and just let it go... the 170 horsepower can't keep up, because this little thing pulls away from it like nothing.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

Hello Martin,

Yes, what you're writing is theoretically correct.

The 125 kW TDI engine also has almost double the turbocharging level compared to the 77 kW version. It's clear that nothing will happen at 1100 rpm.

The situation with the TSI/TFSI engines is a bit different. I would only recommend test driving the new 1.8L engine. It really delivers good performance, with hardly any difference compared to the 2.0L TFSI. It's comparable or even better at lower RPMs. And you don't miss the expensive, potentially problematic twin-charging system.

Best regards,
Albrecht

To shed some light on the 1.4 models:
170 hp -> Turbo and supercharger.
140 hp -> Turbo and supercharger.
122 hp -> turbo only.
I am referring to a well-known automotive magazine.

Since the 122 hp version likely requires a smaller turbocharger due to lower boost pressures, which would also eliminate any significant turbo lag, it seems that a supercharger is no longer necessary. In the test, the 122 hp model was driven against a small diesel Golf and exhibited similar performance and fuel consumption. Ultimately, it won the comparison due to its lower overall cost.

I would highly recommend trying out the small 122 hp TSI engine; it's incredibly fun to drive and is perfect for cars like the Golf and similar models!

P.S. The 122 hp version has been fitted with a water-cooled intercooler!

I'm generally looking at cars in the Passat segment (specifically for my parents, if they were interested).
The main argument will likely be the automatic transmission, which I would prefer to avoid. And the 1.4-liter engine with 122 horsepower isn't available with an automatic in the 3C model.
"However, 160 horsepower seems a bit too much for me..."

It just struck me that VW is now also using these kinds of "fluffy" names for its models, like BMW and Daimler have been doing for a few years.
- The 525 was renamed to 523 so that the 528 would appear more substantial.
- The names used for the A-Class CDI models are completely arbitrary and have nothing to do with the engine anymore.

And now a TSI engine that is almost identical to the TFSI, but which no longer retains any of the unique features that originally defined the TSI.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

Hi Martin, regarding your parents: The Cross Golf is essentially a Golf Plus, but much more stylish. It has a 1.4 TSI engine with 103 kW, a 6-speed DSG transmission, fuel consumption of 7.3 l/100km, emissions of 174 g/km, and a price of €27,000.

It appears that Volkswagen and Audi are using different names for identical engines.

AUDI
1.4 TFSI 125 horsepower .
1.8 TFSI 160 hp
2.0 TFSI, 200/265 horsepower.

VW.
1.4 TSI 122/140/170 HP.
1.8 TSI 160 hp}
2.0 TFSI, 200/230 horsepower.

Whether you call it TSI or TFSI, it doesn't matter. VW has discontinued the TFSI designation and is now using only 'TSI' for everything – just three letters.

As has already been partially mentioned, the currently smallest 1.4-liter engine with turbocharging no longer needs a roots supercharger. Instead, significant effort has gone into realizing its performance solely through the use of a turbocharger. Because less power is required, the smaller turbocharger reaches its operating speed more quickly. To further improve this, a long intake air path was eliminated, which makes the engine very responsive. This was made possible by a novel water-cooled intercooler that is integrated directly into the intake manifold.

greetings