Battery - 205 GTI (GTI6 engine)

[ORB 227 1 Cars]

Yeah, probably the wrong sub section to post this. 
 

I have a 1.9 GTi converted to a 2.0 GTI 6. I need a new battery as it has a cheap wanky one on it now, what is the biggest or best option to go for that’ll fit in the GTi6 battery box in my 205? I’m assuming a diesel battery for the best CCA? 
 

what can my car handle? 

[petert 630]

Why so big? Why not treat yourself to a Lithiumax and save 10-12Kg? I just bought a new one, not that there was anything wrong with the old one, which was 12 years old and weighs just 1.1Kg. I bought a larger one, 3.2Kg Race9+ with M6 terminals.

Edited December 3, 2025 by petert