The Speed model was introduced by Triumph Motorcycles in 1938.​​The original 1938 Speed ​​Twin, with a 500cc parallel twin engine, was a milestone in British motorcycling and evolved after the war to 650cc versions in the 60s and 750cc in the 70s. In 2019 it was reborn as the Speed ​​Twin 1200 and in 2023 the most affordable model, the Street Twin, was renamed the Speed ​​Twin 900. In the sports naked category, Triumph launched the Speed ​​Triple in 1994, always with a three cylinder engine, which has grown from 885cc to 1160cc in the 1200 RS/RR. In between, the unusual Speed ​​Four appeared with a 599cc inline four engine. In 2024, the Speed ​​400 arrived with a modern 398cc single cylinder engine, aimed at new users.