Alfa Romeo Twin Spark technology was used first time in Alfa Romeo Grand Prix

Alfa Romeo Grand Prix

A.L.F.A. 40/60 GP or GP was a fully working early racing car prototype made by the company now called Alfa Romeo. Only one example was built in 1914, which was later modified in 1921. This was creation of Giuseppe Merosi and was first Alfa Romeo DOHC engine. It had also four valves per cylinder,...

 car in 1914. In the early 1960s it was used in their race cars (GTA

Alfa Romeo GTA

The GTA 1300 Junior had a 1300 cc engine that was based on the 1600 engine but with a short stroke crankshaft. The GTA Junior in stradale form did not have many of the light weight features of the 1600 GTA, such as the plastic windows, magnesium engine components and alloy wheels. At start...

, TZ

Alfa Romeo Giulia TZ

The Alfa Romeo Giulia TZ was a small sports car manufactured by Alfa Romeo from 1963 to 1967. It replaced the Giulietta SZ.- TZ :...

) to enable it to achieve a higher power output from its engines. And in the early and middle 1980s, Alfa Romeo incorporated this technology into their road cars to enhance their performance and to comply with stricter emission controls.
Twin Spark name usually refers to the dual ignition

Dual ignition

Dual Ignition is a system for spark-ignition engines, whereby each cylinder has every critical ignition component duplicated, including spark plugs, magnetos and ignition circuits, rather than the more usual single spark plug or circuit...

 engines installed in Alfa Romeo cars.