It is the "parent" category. It refers to any system that mechanically alters the timing of the valve opening and closing relative to the piston's position. Most modern cars—from a Toyota Camry to a Ford F-150—use some form of VVT.
Think of it this way: VVT is like changing the timing of a punch; VTEC is like switching from a jab to a haymaker. vvt vs vtec
While both technologies revolutionized the internal combustion engine, they are often confused as being the same thing. They aren't. One is a broad category of technology, and the other is a specific, legendary brand implementation. It is the "parent" category
To understand the difference, we first have to understand the problem these technologies solve. Think of it this way: VVT is like
if you enjoy high-revving engines and want that mechanical "second wind" when driving spiritedly.