I read somewhere and did some research on synergy hybrid and IMA hyrbrid, you can't fully say that synergy hybrid is better one. Synergy hybrid is much complicated system compare to IMA hybrid. Higher maintenance cost on Synergy hybrid compare to IMA hybrid. Synergy uses a bigger size capacity battery that could cost twice the price of IMA hybrid. example prius battery can cost less than rm20k to replace compare to honda IMA battery cost less than 10k to replace. Synergy hybrid has indepedent petrol engine and electric motor can go on full EV mode-full electric mode. While IMA can't cause both the petrol and electric motor interegrated into 1. IMA hybrid is called semi-hybrid, when prius synergy is full hybrid.

Therefore it's is true that IMA hyrbid will not save as much petrol as synergy hybrid. However to build a IMA hybrid cost lesser Synergy.

Both has it's good and bad and it's up to us to choose to go honda IMA or Toyota Synergy. To me both are the same, you win something, you loss something. You can't get both. =)

Correct me if I'm wrong.

To me I again, I think Honda Civic Hybrid is my choice cause the design is so much better than prius. At least I don't have the bulky backside look. =)