The difference between variable valve lift and variable valve timing!
So what are VVT and VVL and what they do, and why! Engineering explained breaks it down for us with the help of the Humble Mechanic! Watch this video and you will learn everything you need to know about the two types of cams. The engine of choice is a 2009 Audi 2.0L I4 turbo. VVL is used to add performance and VVT is for emissions and fuel saving.