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Altogether, the Cadillac’s drivetrain puts out 335 horsepower and 432 lb-ft of torque, landing it smack dab in the middle of the CT6’s conventional gasoline drivetrain options, which include the aforementioned 265-hp turbo 2.0-liter four, a 335-hp 3.6-liter V-6, and a 404-hp twin-turbo 3.0-liter V-6. But the way that the CT6 plug-in delivers its torque to the ground is decidedly more complex. The three power sources combine their efforts in a transmission consisting of three planetary gearsets, five clutches, and two motors that is capable of four variable gear-ratio spreads and three fixed gear ratios. An 18.4-kWh lithium-ion battery pack provides an EPA-rated 31 miles of electric-only range, more than twice what the BMW 740e offers from its smaller 9.2-kWh battery pack.