Cadillac is finally delivering on its promise to bring the CT6 plug-in hybrid stateside. The China-built luxury sedan will go on sale in spring 2017 with an EV range of approximately 30 miles thanks to an 18.4-kWh battery pack that powers a pair of 100-hp electric motors. Cadillac projects a fuel-economy rating of at least 65 MPGe.
These two motors can take the CT6 plug-in up to an all-electric top speed of 75 mph, after which point the car’s 2.0-liter turbocharged four-cylinder engine fires up. Working in concert, the three power sources produce an estimated 335 horsepower and 432 lb-ft of torque, equaling the horsepower of the CT6’s 3.6-liter V-6 engine and bettering the top-of-the-line 3.0-liter twin-turbo V-6’s 400 lb-ft of torque. Output is sent to the rear wheels through a continuously variable automatic transmission (CVT); all-wheel drive is not offered on the hybrid.
Non-mechanical changes to the CT6 plug-in are few: The passenger’s-side fuel door is complemented by a mirroring driver’s-side door on the rear fender that accesses the car’s charge port, and model-specific badging is added to the bottom of the rear doors. Inside, there are hybrid-specific door sills and instrument graphics.
Priced from $76,090 (before factoring in available local,  state, and federal tax incentives), the CT6 plug-in largely mirrors the features found in the $64,590 Premium Luxury trim level. These include heated and cooled front seats and a panor...