Page "International Formula 3000" Paragraph 2

Formula 3000 replaced Formula Two, and was so named because the engines used initially were 3. 0 L ( 183ci ) Cosworth DFV engines made obsolete by popularization of 1. 5 L turbocharged engines in Formula One.

( It has been observed Bernie Ecclestone had purchased a job-lot of DFVs in 1984, with no obvious use for them at the time ).