In 1997, Chrysler Corporation and Rover Group (later BMW) formed Tritec, a joint venture to design a new small straight-4 engine for small cars. They built a factory in Curitiba, Brazil to manufacture the engine.
The common Mini engine name has two meanings: It refers to the small size of the engine and the cars it would power, and also to the most notable of those cars, the BMW Mini. It is also called the Pentagon and Tritec engine. Production began in September of 1999.
The Tritec engine was designed entirely by Chrysler and is related to the 2.0 liter Chrysler Neon engine. It is a modern engine with an SOHC 4-valve head, Electronic Throttle Control , and meets Euro III emissions requirements. There are three current versions of the engine, 1.4 L, 1.6 L, and supercharged 1.6 L.
BMW will replace this engine in the Mini with a brand new family of small gasoline engines developped in partnership with the PSA Group, now that Chrysler is part of their arch-rival DaimlerChrysler. BMW's contract with Tritec expires in 2007.
1.4
The 1.4 L (1397 cc) version uses a 77 mm bore and 75 mm stroke. Like all Tritecs, it is an SOHC 16-valve aluminum engine with multipoint sequential electronic fuel injection. Output is rated at 55 kW (75 hp DIN) and 122 Nm (90 ft.lbf). This engine is used only in the Portuguese version of the Mini One.
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1.6
The 1.6 L (1598 cc) version uses the same 77 mm bore with a longer 85.8 mm stroke. Output is rated at 66 kW (90 hp DIN) and 140 Nm (104 ft.lbf) in the One, and 85 kW (116 hp DIN) and 149 Nm (110 ft.lbf) in the Cooper.
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1.6 SC
The 1.6 SC uses a Roots-type Eaton M45 supercharger with intercooler. The compression ratio is reduced from 10.5:1 to 8.3:1. Output was initially rated at 120 kW (163 hp DIN) and 210 Nm (155 ft.lbf) but has since been increased to 125 kW (170 hp DIN) and 220 Nm (162 ft.lbf). The 1.6 SC won the "1.4 L to 1.8 L" category at the International Engine of the Year awards for 2003. It also won Ward's 10 Best Engines award for 2005.
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