The　hydrogen-enriched　gasoline　engine　is　a　promising　option　for　future　spark-ignited　(SI)　engines.　However,　the　lack　of　quasi-dimensional　combustion　models　for　hydrogen-gasoline　blends　restrains　the　efficient　prediction　of　its　performance　for　varying　operating　conditions　and　hydrogen　enrichment　strategies.　In　this　paper,　a　quasi-dimensional　model　was　developed　and　validated　for　hydrogen-enriched　gasoline　engines　with　a　new　laminar　flame　speed　expression.　Correspondence　between　the　calculated　and　experimentally　measured　engine　combustion　parameters　was　observed　for　different　hydrogen　addition　levels.　The　comparison　results　indicated　that　the　proposed　quasi　dimensional　model　is　suitable　for　engine　performance　prediction　of　hydrogen-enriched　gasoline　engines.