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The 4.2-liter V8 engine (GM RPO code LTA) is an eight-cylinder, dual overhead cam (DOHC) twin turbo engine produced by General Motors specifically for use in Cadillac luxury vehicles. The engine is the result of a new clean-sheet engine design as well as Cadillac's first twin-turbo V8 engine. It first launched with the 2019 Cadillac CT6. [10]
Starting around 1925 engine blocks and cylinder heads were now developed at each brand but were cast at Saginaw Metal Casting Operations. [3] In the mid-1960s, there were 8 separate families of GM V8 engines on sale in the USA. [4] [1] By the 1970s, GM began to see problems with their approach.
The Northstar engine is a family of high-performance 90° V engines produced by General Motors between 1993 and 2011. Regarded as GM's most technically complex engine, the original double overhead cam, four valve per cylinder, aluminum block/aluminum head V8 design was developed by Oldsmobile R&D, [citation needed] but is most associated with Cadillac's Northstar series.
1913 – Cadillac Model 1913; 120 in wheelbase four-cylinder engine Fisher; 1914 – Cadillac Model 1914; 120 and 134 in wheelbase four-cylinder engine Fisher; 1915 – Cadillac Type 51; 122 and 145 in wheelbase V8 Fisher; 1916 – Cadillac Type 53; 122 132 and 145 in wheelbase V8 Fisher; 1917 – Cadillac Type 55; 125 and 145 in wheelbase V8 ...
Being nearly identical, it too has the distinctive odd-sided hexagonal shape. These engines can be fitted in rear wheel drive vehicles with the right bellhousing and are used in hot rods, kit cars, sand rails and late model engine swaps. All Cadillac Northstar V8s; Oldsmobile Aurora L47 V8; GM 3.5L LX5 "Short Star" V6
The 265 Turbo-Fire distinguished itself from other engines of the era such as Cadillac's 331 series of the late 1940s and early 1950s by reducing the size and weight of various components within the engine; a compact engine block combined with a light valvetrain gave the Turbo-Fire a 40 lb (18 kg) weight reduction compared to the inline-sixes ...
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For 1981 only, the Eldorado was powered by Cadillac's V8-6-4 variable displacement variant of the 368 engine. This was designed to deactivate two or four cylinders when full power was not needed, helping meet GM's government fuel economy (CAFE) averages .