Cadillac CT6

The CT6 was Cadillac's full-size flagship from 2016-2020 — the first RWD full-size Cadillac since the Fleetwood ended in 1996. Omega platform (lightweight aluminum-intensive), with engine options across the run including 2.0L turbo I4, 3.6L V6 NA, 3.0L twin-turbo V6 (the 'Vsport' / V engine), and uniquely the 4.2L 'Blackwing' twin-turbo V8 making 500-550 hp on the CT6-V. The Blackwing V8 was a clean-sheet Cadillac-only engine, hand-built in low volume — never used in any other GM product. Super Cruise hands-free highway driving was offered from 2018 (a genuine Cadillac-first technology that's still referenced in the industry). Plug-in hybrid CT6 PHEV (2017-2018) used Voltec hybrid tech from the Chevrolet Volt. Final 2019-2020 production was Chinese-built. CT6-V at 550 hp / 640 lb-ft was the most powerful CT6 — RWD-with-AWD-optional. Production discontinued 2020 in the US (continues in China). Now a rapidly-depreciating luxury sedan with a unique V8 — the CT6-V Blackwing examples are quietly collectible.