Alfa Romeo introduced the first variable valve timing system used in a production car.
The system appeared in fuel-injected versions of the 1980 Alfa Romeo Spider 2000. It was a mechanical arrangement that altered the phase of the inlet camshaft, changing when the valves opened relative to the crankshaft. That helped the engine balance low-speed drivability with stronger performance at higher engine speeds.
The design grew from work by Alfa Romeo engineer Giampaolo Garcea during the 1970s and is associated with the company’s “variatore di fase.” It changed cam timing rather than valve lift or duration. Later Alfa Romeo Spider models adopted electronic VVT, and the company’s Twin Spark engines helped make the technology more widely known.
A common mix-up is Honda’s VTEC, introduced in 1989. VTEC became famous, but it arrived later and primarily switches between different cam profiles. Porsche’s VarioCam, introduced in 1992, is notable for being the first continuously adjustable system, not the first production-car VVT system overall.