Editing Flat-twelve engine (section)

{{Short description|Horizontally-opposed 12-cylinder piston engine}}
{{Use dmy dates|date=June 2019}}
[[File:Ferrari Testarossa Motor.jpg|thumb|upright=1.2|1984-1991 [[Ferrari Testarossa]] mid-mounted engine]]

A '''flat-twelve engine''', also known as a '''horizontally opposed-twelve''', is a twelve-cylinder [[piston engine]] with six cylinders on each side of a central [[crankshaft]].

Flat-twelve engines are less common than [[V12 engine]]s, but they have been used in various racing cars during the 1960s and 1970s, and in mid-engined Ferrari road cars from 1973 to 1996.