Editing AMC straight-6 engine (section)

{{Short description|Series of I6 engines built by American Motors and Chrysler}}
{{Main|List of AMC engines}}
{{Use dmy dates|date=April 2024}}

{{Infobox automobile engine
| name = AMC Straight-6 engine
| image = 1973 AMC Matador wagon sx-Cecil'10.jpg
| manufacturer =  {{ubl | [[American Motors Corporation]] (1964-1987) | [[Chrysler Corporation]] (1987-2006) }}
| production = 1964–2006
| configuration = [[Naturally aspirated]] [[Straight-six engine|Straight-6]]
| block = [[Cast-iron]]
| head = [[Cast-iron]]
| valvetrain = [[Overhead valve engine|OHV]] 2 valves x cyl.
| fueltype = [[Petrol engine|Gasoline]]
| fuelsystem =  {{ubl | [[Carburetor]] | [[Multi-port fuel injection]] }}
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| management =  {{ubl | [[AMC Computerized Engine Control|AMC CEC]] | [[Renix]] or [[Mopar]] (manufactured by [[Siemens]]) }}
| displacement = {{ubl |{{cvt|199|CID|L|1}}|{{cvt|232|CID|L|1}}|{{cvt|242|CID|L|1}}|{{cvt|252|CID|L|1}}|{{cvt|258|CID|L|1}}|{{cvt|282|CID|L|1}} }}
| bore = {{ubl | {{cvt|3.75|in|mm|1}} | {{cvt|3.875|in|mm|1}} | {{cvt|3.91|in|mm|1}} | {{cvt|3.917|in|mm|1}} }}
| stroke = {{ubl | {{cvt|3|in|mm|1}} | {{cvt|3.414|in|mm|1}} | {{cvt|3.4375|in|mm|1}} | {{cvt|3.5|in|mm|1}} | {{cvt|3.895|in|mm|1}} }}
| power = {{cvt|129–200|hp|kW PS|0}}
| torque = {{cvt|216–280|lbft|Nm|0}}
| weight = {{cvt|483|lb|kg}} (4.0&nbsp;L engine)
| compression = 7.7:1, 8.0:1, 8.5:1, 9.5:1
}}

The '''AMC straight-6 engine''' is a family of [[straight-six engine]]s produced by [[American Motors Corporation]] (AMC) and used in passenger cars and [[Jeep]] vehicles from 1964 through 2006. Production continued after [[Chrysler]] acquired AMC in 1987.

American Motors' first inline-six engine was a legacy model initially designed by [[Nash Motors]]; it was discontinued in 1965. A completely new design was introduced by AMC in 1964. The engine evolved in several displacements and underwent upgrades. [[Vehículos Automotores Mexicanos]] (VAM) also manufactured this family of six-cylinder engines, including a version available only in Mexico.

A new 4.0&nbsp;L engine was introduced by AMC in 1986 and became the final version of AMC inline sixes. It is regarded as one of the best 4x4 and off-road engines. This engine was produced by Chrysler through 2006.

Among "classic American engines, the AMC straight-six stands as a testament to smart engineering and enduring performance".<ref>{{cite web|url= https://automotiveamerican.com/2024/11/27/the-amc-straight-six-a-long-running-story/
|title=The AMC Straight Six, a Long Running Story |date=27 November 2024 |website=automotiveamerican.com |access-date=2 April 2025}}</ref>