I like Ferarri's system. Too bad it's not on my
anytime soon.
One problem with Toyota's system though is the i part. Sure VVTi may be a decent variable valve timing system, but the "intelligence" that they put into the system can be a huge nuissance. It can also be a benefit, it just depends on your driving style.
I guess the i doesn't have so much to do with valve timing as it does with A/F mixture, at least from what I understand.
b