Hi Skidpan, Are you sure the autoevolution article is irrelevant?
Not an expert on these engines, only had the TSI 10 weeks thus only know what I learned when buying plus a bit of background having looked at a Skoda with the 122 PS 1.4 TSI about 3 years ago.
On second reading the article is more a load of bollocks than irrelevant. the writer clearly has no idea.
To point out a few obvious errors:
It refers to the 1.2 being all alloy and being introduced in 2009. The TSI engines in 2009 had an iron block like the earlier 1.4 TSI engines
Others have confirmed on this site that the alloy block was only introduced for the new 1.2 TSI engines now in use. Others have also said that the current 1.2 TSI is belt driven. Personally I cannot confirm either of these, never looked under the bonnet of a new 1.2 TSi Leon but information I have seen on the web (Skoda?) appears to confirm that the 1.2 and 1.4 are the same new family.
The information about the 1.4 TSI is clearly old since the say the capacity is 1390, its 1395 on the new engine and they also talk about a twin charged engines of 170 bhp which are currently not sold (not in the UK at least).
There is some new info, it refers to the ACT feature and that is definitely only available on the new 1.4 TSI.
The writer appears to have mixed info about the old and new engines and has not made it clear which he is referring to.