Jaime Alguersuari Tortajada (Spanish pronunciation: ['xaime al?e?'swa?i]; also known as Jaime Alguersuari Sr., born April 2, 1950 in Barcelona, Spain), is a Spanish former Grand Prix motorcycle racer.
Through his companies Alesport and RPM, he invented indoor trial and endurocross with events at the Palau Sant Jordi in Barcelona.
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.