Ford discontinued production of the H-series engine for the 1951 model year.Ī 254 cu in (4.2 L) version of the L-6 (designated the M-series or Rouge 254) was used from 1950 to 1953 in F6-series Ford trucks ( COE, dump, truck-tractor, etc.), and small Ford school buses. The G- and H-series engines were used in the full-sized Ford cars and trucks to replace the smaller 136 cu in (2.2 L) Flathead V8 that was used in the 1937 Ford. In 1948, Ford raised the compression of the flathead six or L-6 (designated H-series or Rouge 226) so that it generated 95 hp (71 kW) and 180 lb⋅ft (244 N⋅m) of torque. Like the V-8, it was also a flathead or L-head engine.

Introduced for the 1941 model year, the first Ford L-6 (designated G-series) displaced 226 cu in (3.7 L) and produced 90 hp (67 kW), the same as the Flathead V-8 that year. They were the G- and H-series engines of 226 cu in (3.7 L) used in cars and trucks and the M-series of 254 cu in (4.2 L) used in larger Ford trucks and for industrial applications. The first-generation Ford six-cylinder engines were all flatheads. Following the closure of the Australian engine plant, Ford no longer produces a straight-six gasoline engine. Ford continued producing straight-six engines for use in its North American vehicles until 1996, when they were discontinued in favor of more compact V6 designs.įord Australia also manufactured straight-six engines in Australia for the Falcon and Territory models until 2016, when both vehicle lines were discontinued. The next was introduced in the 1941 Ford. In 1906, the first Ford straight-six was introduced in the Model K. The Ford Motor Company produced straight-six engines from 1906 until 1908 and from 1941 until 2016.

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