Guys. but in term of petrol efficiency? which one better?

I think ull get better fuel efficiency with the Camry but dont forget that the Camry 2.0L is underpowered so FC will suffer a bit. At 110kmph, the Camry's RPM is at 1750 while the Optima's RPM is at 2250. The Optima's gear ratio is set higher to cater for more power while the Camry is set for fuel economy.

But u gotta look at it from a braoder aspect. Many other criteria's to consider. You can also refer to this thread for more info:

http://forum.lowyat.net/topic/1941075/+2200

http://forum.lowyat.net/topic/2469087/+260

my company just bought the new camry 2.5V on Sept 2012, now the steering has tak tak sound everytime turning on it, also the ppwer windows has clak clak sound when winding down...already sent to warranty...

I may get shot for saying this, but for your age of 25, better dont drive a camry. Optima K5 is also slightly bordering on the "uncle-ness" due to the classification of these 2 cars. But if between these 2, definately the K5 for being sportier. Camry is seriously too uncle-ish

The kimchi gets my vote here.

Kimchi power ftw~!

so true..

if ure below 30 def take K5 lah.u draip camry people will be mistakenly tot u draip ur grandma s car..