Hey MTEC,
I may be slightly delayed replying to this, but I must say, there is no such negative performances on Teana, any machines are bourne to have some techincal problem, which can be sorted, repaired. I am sure you will agree that even if you purchase Camr, Accord, you would not know until to have driven your car.
I do admit posting some issues which is meant to be shared and fix, so others don have to undergone any pain to look for solutions. anyway, as other Teana Bro have suggested, better have test drive and you will know the difference. Normally TC Showrooms have 2.5L as test drives, but I am sure for your own satisfaction, you want to pressure Sales Agent to drive 2.0L and have your own judgement.
If you must know the advantages have Teana, please refer to the below comments, which i feel very happy owning Teana
1. The sense of Luxury drive Teana, you will not know until you drive often
2. FC seems good for me, nor doubt others may compare with their car, I always get 600KM each full tank. this is again my personal driving method as sometimes I like to speed and sometimes I like to cruise
3. I've took friends, colleague and family in my car and they feel good confort, they don even feel the car accelerate
I can go on and on bragging about Teana, which real point i am trying to convey is I do not se any problems owning one! Anyway, just for your info, I purchased the metalic Grey and own 2.5L. Accelerate is superb and sometimes scary as I can touch 200 Kmph! Anyway I have friend who owns 2.0 L and it's eaqually powerful and confortable as 2.5.
Hope this clarifies and it's up to you to make your own choise what car you prefer

Same here...never regret once for owning this teana. It is a way too comfort! The NVH is very good.
Bro, did u upgrade ur rim n tyre? I m planning to upgrade to 19 inch rim n tyre.
Yesterday back from johor n i sped 190 km/h. Stable...n my wife sitting at the back with my baby dunno i was on that speed until i told her. She really enjoyed the comfort cruise of the teana.
Although teana come with only 16 inch rim in stock, the stability of the car while cruising in high speed is still acceptable. I want it to be more stable now coz i drive alot to outstation currently with high speed.
So checking with all bros here to share who has upgraded his pair of teana boots...