[FrEos]

Just so we all know; the new, smoother common-rail TDI (same hp & torque) is fitted to all Eos produced on or after Monday, May 26.

Thanks to the info on the 2009 MY posted on this board, I was able to amend the order I placed on Friday 30 May to ensure I would get one of the new engines and other goodies like the big colour screen radio, etc.

 

[evolvingpowercat]

Here is some info on the new engine from VWvortex 2.0T engine forum:

The new 2.0 (CCTA) engine is a complete new design and improves in many areas where the old engine was a compromise

balance shafts: BPY (old 2.0T) has a add-on solution (expensive) vs build-in in CCTA. The goal is to improve the accoustic behavior as well as the mid- to high-end vibration. This will help wear and tear long term for any attached part as well as internal engine block parts.

engine block: aside from the fact that the engine block is shared with the new 1.8L engine of the same family ( hence "world engine") it has been build for higher average internal pressures up to 25 Bar. That in turn allows for higher specific power output of greater 100kW/L and 175Nm/L. The current BPY engine is by far not build for that.

engine block vs crankshaft: to prevent longterm warping Audi/VW used a metal composition with almost identical expansion coefficients 13.17 and 13.26 um/mK. This has been an issue with the bearings at high power output and high temperature.

thermal profiles: the engine was optimized for higher temp effeciency which means less losses and better gas milage.

Head and block: the head is aluminum and has a different characteristic. To minimize stress between both parts they used highly komplex FEM Modells to optimize the mounting points and a better more evenly distribution of the stress points. That's a major improvement for the gaskets and for the head mounts (bolts). The old engine wasn't optimized that well.

waterpump and thermostat housing was removed from the block because of the lack of structurell support. But all oil and oil return paths , blow-by paths and chain housing was integrated. The engine is lighter, shorter, better to maintain due to an overall lower component count for the engine. Keep in mind, this engine is also cheaper to manufacture (one of the main goals) as well as being manufacturable all over the world (in the US as well). This engine was actually a co-developent of Audi and a steel plant (sounds funny I know, but they have the knowledge of HOW to make it). This was not driven by VW.

Needless to say that, in the current configuration this engine is good for 270HP in the standart build. In the paper they also talked about the manufacturing process of precision pouring and casting and there they are about a factor of 2x better than on the old engine. Their process window is much much tighter now and more reliable. That bgood for process variation.

So knowing what is in the paper, and neglecting the modding aspect of the older BPY engine for the moment, the CCTA engine is a generation better, more reliable and more efficient. The smaller new 1.8L brother is already one of the best choices in germany. Compared to the older 1.8T engine it has 50% more torque (less 10 HP) but is almost as drivable as the 2.0L BPY engine. And that is a statement in one of my german car magazines. So my choice is clear here. Anyone who has the new engine now is lucky to have it, because it's the future.

(Audi will have some mods that VW engines won't get like variable valve lifting)

 

[FrEos]

I think we can safely assume that by 2020 we will all be driving 2500hp cars that do 800mpg

 

[davidp]

I'm rather confused by all this. I am considering a diesel Eos next time especially if the engine is quieter and has more power.
Does anyone know:
1) is the new diesel engine common rail or PD?
2) is it 1.8 or 2.0?
3) Do we have any idea what bhp and mpg are likely to be?
4) what does CCTA stand for?

Cheers, David

 

[FrEos]

1. it's common rail
2. 2.0 - it's exactly the same engine, only with common rail instead of PD. The detailed post above refers to the 2.0 litre petrol engine.
3. yes we do, and they're identical (140hp, 320Nm)
4. don't know

My dealer said that the 170hp TDI will inevitably be offered at some point, though he had no dates.

 

[davidp]

Thanks FrEos thats very helpful.

The 170bhp TDI would be a better option in the Eos although in my experience dealers talk rubbish for the sake of talking so you can't believe anything they say.

So the new engine is essentially the old one with a new head sporting a common rail injection system. I always understood that the reason the PD engine was noisey was due to the high pressure (over 2000psi) of the PD system, though to be fair the PD system produces more power and is more efficient. So now VW are returning to a common rail injection system, goodness me its all very confusing to a bear of little brain

Hopefully by the time I'm ready to buy in late 2009 the new engine will be available as an option.

Cheers, David

 

[FrEos]

So the new engine is essentially the old one with a new head sporting a common rail injection system.

Correct I agree dealers do often spout nonsense just to cover up their innate incompetence