Jaime Alguersuari Tortajada (Spanish pronunciation: [ˈxajme alɣeɾˈswaɾi]; also known as Jaime Alguersuari Sr., born April 2, 1950, in Barcelona, Spain), is a Spanish former Grand Prix motorcycle racer.

He won the 250 cc category at the 1972 Bol d'Or at Le Mans on a Montesa.

[1] In 1975, he and his brother José Maria founded the Solo Moto magazine.

Through his companies Alesport and RPM, he invented indoor trial and endurocross with events at the Palau Sant Jordi in Barcelona.

[2] In addition to motorcycling events, RPM has organized the World Series by Renault, the Barcelona Marathon, the Spanish stages of the Rally Dakar, and the Superprestigio Dirt Track.