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Cadillac 4.2 Liter Twin Turbo V-8 Engine

The Cadillac 4.2-liter Twin-Turbo V-8 engine was officially announced in March 21st in conjunction with the refreshed 2019 Cadillac CT6. The engine is a clean-sheet design that was developed as a small-displacement V-8 with the goal of delivering exceptional power density of 131 hp (98 kW) per liter for an estimated 550 horsepower (410 kW) and 627 pound-feet of torque (850 Nm) in the 2019 Cadillac CT6 V-Sport.

The engine is assigned RPO code LTA. See complete details on the Cadillac 4.2L Twin-Turbo V-8 LTA engine.

GM Authority shared the following expectation information prior to the engine’s official announcement on March 21, 2018.

Cadillac executives have confirmed that the brand is currently developing a new turbocharged eight-cylinder engine.

Confirmed Information

The following information about the 4.2L Twin-Turbo V-8 has been confirmed:

  • 4.2L displacement
  • V-8 configuration
  • Two turbochargers
  • Not related to GM’s Small-Block V-8 engine family
  • Not related to Supercharged 6.2L V-8 LT4 engine
  • Due to launch in variant of the Cadillac CT6, possibly the CT6 V-Sport

Not Confirmed But Expected Information:

The following information about the 4.2L Twin-Turbo V-8 has not been confirmed, but is expected:

  • Dual Overhead Cam (DOHC) configuration
  • Horsepower and torque output in the high 400s or mid-500s
  • Vehicles with the engine could wear a 4.2TT badge

 

Horsepower

In January 2016, Cadillac President Johan de Nysschen stated that the upcoming 4.2.-liter V-8 will have a power output in the “in the upper 400s”.

Torque

Though not confirmed by Cadillac or General Motors, we expect that the new engine will make roughly 500 pound-feet of torque.

Transmission

The engine will likely be mated to the new GM 10-speed automatic transmission.

The new Cadillac 4.2-liter V-8 engine is expected to be available in the following vehicles:

Cadillac 4.2 Liter Twin Turbo V-8 Engine Pages

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