In 1948, at age 12, Reventlow was introduced to the world of Grand Prix motor racing when his mother married Prince Igor Troubetzkoy, who won the Targa Florio that year.
En 1948, aos 12 anos, Reventlow descubriu o mundo dos Grandes Premios das carreiras de motor cando a súa nai casouse con Prince Igor Troubetzkoy, que gañou o Targa Florio ese ano.