Roberto Car (born 3 January 1947 in Trieste) is an Italian physicist, who works on simulation of molecular dynamics phenomena.
Car studied physics and attained a doctorate in 1971 in nuclear technology at the Politecnico di Milano. He was in 1973/74 a postdoc at the University of Milan, from 1977 to 1981 an assistant at the École Polytechnique Fédérale de Lausanne, from 1981 to 1983 at the Thomas J. Watson Research Center of IBM, from 1984 to 1990 associate professor for physics at SISSA in Trieste (in 1990/91 as full professor) and from 1991 to 1999 professor for physics at the University of Geneva (and director of the IRRMA of the ETH Lausanne).
He went in 1999 to Princeton University, where he became the Ralph W. Dornte professor for chemistry with a simultaneous appointment at the Material Sciences Institute of the university. He is a professor in the Theory Department, of the Fritz Haber Institute of the Max Planck Society.
He is a member of the Italian Scientists and Scholars in North America Foundation.