W12 / 2 = L6 作者: RobinQ 时间: 8-11-2011 13:33 标题: what does the L in L6 mean? is it a Inline 6? While it is an inline engine the L was actually the designation for a "flat head" engine or an engine with the valves in the block rather than the head. Most of the early engine designs were flat heads.