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The LLT engine has a compression ratio of 11.3:1, and has been certified by the SAE to produce 302 hp (225 kW; 306 PS) at 6300 rpm and 272 lb⋅ft (369 N⋅m) of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine debuted on the 2008 Cadillac STS and CTS.
The Cadillac CTS is a luxury car, manufactured and marketed by General Motors from 2003 until 2019 across three generations.. Initially available as a 4-door sedan using the GM Sigma platform, GM offered the second generation CTS in 4-door sedan, 2-door coupe, and 5-door sport wagon, and the third generation as a sedan, using a stretched version of the GM Alpha platform.
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.
The 3.2 L; 193.8 cu in (3,175 cc) LA3 or Y32SE is a complete redesign of the L81 for the Cadillac CTS and Opel Omega B. [citation needed] It had fixed (non-variable) valve timing, and a variable length intake manifold. The engine has a 87.5 mm × 88 mm (3.44 in × 3.46 in) bore and stroke with a 10.0:1 compression ratio.
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
This engine was first used in the Cadillac CTS as well as the Cadillac STS and marks its third use in a North American GM car. With this 3.6 L engine, the Aura was the first front-wheel drive GM passenger car to use the new Hydra-Matic 6T70 six-speed automatic transmission. [14]
The Cadillac STS was assembled at GM's Lansing Grand River facility in Lansing, Michigan along with the smaller CTS sedan. Available engines were a 3.6 L High Feature LY7 V6 with 255 hp (190 kW) and 252 lb⋅ft (342 N⋅m) and the 4.6 L Northstar LH2 V8 which puts out 320 hp (240 kW) and 315 lb⋅ft (427 N⋅m) in the STS.
The 5L40-E (and similar 5L50) are a series of automatic transmissions made by General Motors.Designed for longitudinal engine configurations, the series includes 5 forward gears and is used in the GM Sigma platform vehicles from Cadillac, the Pontiac Solstice, BMW, and Holden Commodore.