Hmm, I really wish I had the smarts and patience to fully read and understand what this is all about. Nick, care to summarise?

What problem is a-vtect solving?
Does it produce more power/torque more reliably than what, a BMW?

Is this to say BMW is the currently leader in VVT tech, and Honda is catching up / raising the bar?

 

Gesture of hand passing over head.

 

Basically, yes to all!

Having a butterfly throttle blocking the air intake makes a petrol engine very inefficient.

If you lose it & use the valves instead, Honda reckon a 13% reduction in fuel consumption, better emissions and you can fix the (deliberately) lousy torque of many binary-VTEC engines, if you want to.

The problem has been to make an infinitely adjustable valve lift & make it reliable and quiet.

Valvetronic was there first, but it might be wear-prone & has other flexibility disadvantages over A-VTEC.