2953

... <font color="003366">the PSK in Ingolstadt approved S versions (as in S3, S4, S6, S8 not that S-Line stuff) of the next generation TT coupe and roadster. These will use an all-aluminum 2.0L turbocharged 16-valve FSI four-cylinder that is good for 280PS in Euro 4 emissions trim.

S models come out about a year after the next gen-car goes on sale. This is for the European market at the moment. Don't know if the model will be merchandised in North America.

Just though you'd appreciate the update.</font>

YosemyTT

any clues on why they would use a 16v instead of a 20v plant?

Thanks for the update btw.

PDXA4

Cool, Turbo lives on in a S-car...

2953

...<font color="003366"> technology for gasoline-fueled engines. Packaging the injector in a 5-valve design compromised the valve size and placement enough where the flow was no better than a good 4-valve arrangement. Still more costly but with no payoff.

Emissions, specifically Euro 4 emissions, are easier to meet with the 4-valve setup. So bye-bye 20v.</font>

YosemyTT

Audi and VW always played up the 5v/cylinder technology as being cleaner. It seems that 4v is actually cleaner...strange.

Does this also mean that the current 1.8t will be the last of the 5v engines?

2953

... <font color="003366">for the remaining 2.8L and 3.0L 90° V6 gasoline engines at Audi and VW.</font>

YosemyTT

Uhuh. Thanks for the info.

EasTTcoasTT

While initially they found a lot of benefit... overall, I think that it proved to be more costly, and also more flow could be had from 4 valves.

2953

Interesting to note that 5-valves never worked out for any F1 team that tried 'em.

EasTTcoasTT

I remember when Mercedes was leading the charge on how much superior 5 valve technology was when they had introduced it on their 500 engines initially on the SL, when peak HP dropped from 318 to 302.. most people couldn't understand that.