which golf engine is ok to buy?

[pologti18t]

We get the 1.4 TSI engine that doesn't incorporate the ACT head etc. Its not old tech its just a different version of the engine.
ACT is quite expensive for little benefit (in Australia etc)

[Amalgam]

ACT is available on the Audis in Au.

My understanding is that the engines are from the same family and the non ACT version are used in the Golf for market differentiation.

[Mountainman]

The 1.4 TSI engines in the Mk7 have nothing to do with the 1.4 engines in the Mk6 other than sharing bore centres. They have alloy blocks (not iron), long stroke / narrow bore, cam belt rather than chain and the exhaust / turbo is at the back of the engine and fuel injection / intake at the front of the engine (opposite to Mk6). In 22,000km my Mk7 has used no oil. My Mk6 used 1L every 3,000km. They sound and feel similar but the Mk7 has a broader spread of torque, is faster (61kg less weight helps there) and is quite a bit (no, lots) more economical. And I seem to have one that has no wastegate actuator rod rattle, so they don't all do it. The only other one I drove didn't have it either. It's the most perfect car I've ever owned in over 40 years of driving.