Audi to upgrade its 5-cylinder engine to catch up with AMG

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German horsepower battle​

Audi is working on an upgrade for its 5-cylinder, 2.5-liter gasoline engine to catch up with AMG's 4-cylinder, 2.0-liter turbo in the upcoming Mercedes-Benz A45 AMG.
Audi's quattro division is impressed by AMG's engine and they plan on tweaking the combustion process of the five-cylinder unit as an attempt to squeeze additional horsepower and torque, while at the same time slashing emissions.
While the AMG 4-cylinder turbo engine produces 350 hp (261 kW), the most powerful version of the 5-cylinder, 2.5-liter TFSI offered by Audi develops only an additional 10 hp (7.4 kW) compared to the German four-pot.
Audi also has another thing to worry. In September 2014 the EU6 emissions regulations will be introduced in Europe. In an interview given by quattro development boss Stephan Reil to Motoring.com.au, he said "the five-cylinder engine has to be EU6-compliant and we have to modify it" by making changes to the catalysts and geometry.​

Source: motoring.com.au via motorauthority.com​

 

[Merc1]

These engines are going to have the refinement of a tractor engine by the time they get all this hp out of them.

M

 

[Huckfeldt]

In terms of vibration, which configuration is better ?

 

[Deckhook]

I would have thought the 4 cylinder unit would be more refined.

 

[Zafiro]

Adult Children This is something BMW never does j/k

 

[Sunny]

In terms of vibration, which configuration is better ?

Straight six! . Between 4 and 5, I think both are bad, as far as inherent balance is concerned.

 

[AudiQuattro]

I wonder with an odd number of cylinder banks if Audi have planed to develop cylinder deactivation on this engine?

I still expect the engines to be refined. I think if anything the high performance engines are tested more than their standard counterparts to ensure tolerances and reliability.

I expect Audi to develop something just as impressive as AMG and who knows we may see this engine in something very special like the ULTRA TT

 

[Deckhook]

Even the current engine is something special as anyone who's driven one can confirm so any improvement will in my opinion is could only get more special. As for cylinder deactivation, yeah this sounds very likely with its cutting two and making it run as a three cylinder.

Now to the new 2.0T from AMG, well that's an engine I'm most eager to sample because its at a higher than usual level of hp/L, what will its turbo lag be like and will it have a progressive power delivery instead of a peaky one. It's so out of character for Mercedes to use high hp/L as all other use increased engine capacity to achieve their goal.

 

[merc4]

Now to the new 2.0T from AMG, well that's an engine I'm most eager to sample because its at a higher than usual level of hp/L, what will its turbo lag be like and will it have a progressive power delivery instead of a peaky one. It's so out of character for Mercedes to use high hp/L as all other use increased engine capacity to achieve their goal.

The word has it that they do it because they developed I believe 1,6 turbo for F1 but since then F1 decided against smaller turbo R4s, so they had it and better use the technology in some way then to throw it out of the window. I am sure they would not otherwise do it and we should not hope for something like a 3,0 V6 TT with 500 PS for the upcoming C AMG.

 

[chonkoa]

In terms of vibration, which configuration is better ?

Inline configuration.

 

[Sunny]

Inline configuration.

Well, both the engines in question here, the 4 cylinder AMG unit and the 5 cylinder Audi unit are inline. Inherent balance of an engine doesn't depend just on the cylinder configuration, but also number of cylinders (and their firing sequence).

 

[chonkoa]

Well, both the engines in question here, the 4 cylinder AMG unit and the 5 cylinder Audi unit are inline. Inherent balance of an engine doesn't depend just on the cylinder configuration, but also number of cylinders (and their firing sequence).

Absolutely.
My response was rather a generic answer to a question that requires specifics. Even cylinders regardless of configuration(Straight/Vee/W) tend to be more naturally balanced that odd cylinder count.

 

[Deckhook]

Regardless of the refinement issue its the Audi engine with its unique engine note that is the most musical and memorable IMO, I've yet to hear an inline 4 sound anything remotely as interesting or pleasurable.

 

[AudiQuattro]

As for cylinder deactivation, yeah this sounds very likely with its cutting two and making it run as a three cylinder.



Why not cut three cylinders and run on two. This would be more economical

 

[Deckhook]

^Who knows what might transpire, I'm just of the opinion that when it's a so-called performance car the cutting to three instead of two would be better.

 

[AudiQuattro]

I think this is the wrong way to think. Cylinder de-activation is mainly about incorporating an economic gain in efficciency so cutting three cylinder is more likely. Any performance aspects would be under a high load condition so all cylinders would be in operation at this point anyway

 

[Gianclaudio]

Regardless of the refinement issue its the Audi engine with its unique engine note that is the most musical and memorable IMO, I've yet to hear an inline 4 sound anything remotely as interesting or pleasurable.

Honda S2000 says hello

 

[Deckhook]

Honda S2000 says hello

Sorry but still no good, no inline four sounds that brilliant no matter how high it revs. Though I do remember the RS1800 Escort sounding rather good but still nowhere near that classic rally Quattro note that the 2.5TFSI mimics.

 

[Hofmeister]

If anyone needs to be reminded how intoxicating the current unit sounds.....

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