For two decades, Cadillac's V-Series models have been the pinnacle of the American automaker's performance models. It started with the Cadillac CTS-V, and today only two models bear the V-Series badge: the Cadillac CT4-V and the Cadillac CT5-V, the former being the most affordable, even in its Blackwing configuration.For a bare-bones example of the last manual, twin-turbo V6, rear-wheel-drive sedan left in America, expect to shell out nearly $64,000; a fully loaded example costs more than $10,000 above its MSRP. For that, you'd get a well-sorted and capable performance sedan. However, another V-Series model might have been the shortest-lived of the V-Series family, offering more power and available on the used market for less than the Cadillac CT4-V Blackwing. A Brief Recap Of The Cadillac CT6-V Cadillac The Cadillac CT6 was Cadillac's premium luxury sedan, positioned above the mid-size CT4 and CT5 in the model hierarchy. Cadillac debuted this luxury sedan at the 2015 New York International Auto Show, and a year later, it was on sale. It was Cadillac's return to the luxury segment and, as such, would be in contention with the Mercedes-Benz S-Class and the BMW 7 Series."The CT6 is nothing less than an entirely new approach to premium luxury – and an approach only Cadillac can offer. It is a bold endeavor with unmatched dynamism that reignites a passion for driving in large luxury vehicles. In short, it is prestige luxury reimagined." – Johan de Nysschen, former president of Cadillac.To draw attention and establish the CT6 as a competent alternative, it was chock-full of advanced technologies, including an advanced body structure that made it the lightest and most agile member of its segment, as well as better dimensions than the BMW 7 Series. In its earliest years, the Cadillac CT6 showed little inclination toward performance, with its various trim levels powered by four-cylinder and V6 engines, the most powerful commanding just over 400 hp.Then, in 2018 – at the New York International Auto Show – Cadillac introduced the V-Series iteration of its full-sized luxury sedan, distinguished not only by its good looks but also by its greater performance, thanks to its Blackwing engine. With this increase in power and performance, the Cadillac CT6-V was a dead ringer for an alternative to the Mercedes-AMG S63 and the BMW M760i xDrive, while costing roughly $50,000 less at its $94,895 MSRP for the 2019 model year."With the introduction of the all-new CT6 V-Sport, Cadillac begins a new chapter in its performance legacy with the introduction of the brand's first-ever twin-turbo V-8 engine. It is the centerpiece of the new CT6 V-Sport, an engaging sport sedan infused with DNA of Cadillac's world-renowned and championship-winning motorsports program." – Johan de Nysschen, former president of Cadillac. Scarce, But More Affordable Than A 2026 CT4-V Blackwing Cadillac The Cadillac CT6-V was only around for two model years – 2019 and 2020 – with less than 1,000 units built: 504 and 411 respectively. As you'd expect – because of its short production run and the number of examples that left the factory in that time – the Cadillac CT6-V is not as available on the used market as the Cadillac CT4-V Blackwing. However, despite this, its value has softened considerably in the roughly half a decade since its production ended.Cadillac Today, the Cadillac CT6-V can be had for anywhere from $58,000 to roughly $66,000, with examples listed below and above that range. At the lowest end of the spectrum, the Cadillac CT6-V can – at the time of publication – be had for as low as $41,995 for a 2019 model with nearly 100,000 miles and still equipped with the original hardware. The majority of Cadillac CT6-V examples are priced between $53,000 and $64,000. That's in the sweet spot of the average price of a new car in 2026, and around half of what you'd pay for a brand-new BMW 7 Series or Mercedes S-Class.One example of the 2019 Cadillac CT6-V with less than 40,000 miles is priced at $57,400, while another 2020 Cadillac CT6-V with slightly more mileage and nearly identical specs is listed for $55,700. At the higher end of the spectrum, there are examples of the Cadillac CT6-V with a one-owner history, and at a more desirable specification, it is listed for $64,895. Around this price point, expect examples of the Cadillac CT6-V with lower mileage, but an appealing example can still be had for less than the cost of a new Cadillac CT4-V Blackwing. How It Compares To The Modern V-Series Sedans CadillacThe Cadillac CT6-V was distinguished from its contemporaries within its model range by its engine, aptly named the Blackwing, a twin-turbocharged V8 featuring a lightweight aluminum block and a rotating assembly comprising a forged steel crankshaft, forged connecting rods, and aluminum pistons. Paired with a pair of turbochargers, this eight-cylinder power unit offered almost 100 more horsepower than the modern Cadillac CT4-V Blackwing. And while the CT4-V Blackwing offered a manual transmission option, the CT6-V only came as a 10-speed automatic.Cadillac Compared to its main rivals, the BMW M760i xDrive and Mercedes-AMG S63 sedan, the less-powerful Cadillac CT6-V was an appealing alternative, offering significant savings while only slightly slower and less powerful. However, it is not on par with the Cadillac CT5-V Blackwing in terms of performance. This engine was not only used in the Cadillac CT6-V but also in the Cadillac CT6 Platinum. We Never Saw A Sequel To The Cadillac CT6-V Cadillac Even though the Cadillac CT6-V was a commendable luxury sedan powered by an equally commendable engine, its lackluster sales figures – along with the decision to retool the plant where it was born to accommodate electric-vehicle production – led to its end in 2020. After the Cadillac CT6-V's production ended, there was no immediate successor to this luxury sedan until 2022, when images of what appeared to be the second-generation Cadillac CT6 leaked.Interestingly, in a recent interview with InsideEVs, Cadillac's current president commented on cars that had promise and appeal but were cut short. Mark Ruess commented on the company's decision to discontinue the Cadillac CT6, stating:"I wish we didn't have to stop the CT6 for Cadillac, but we did. And we converted Factory Zero, and we wouldn't have the trucks that are in that factory."A year later, the world was introduced to the second-generation Cadillac CT6, though this time there was no V-Series member in the model lineup; it offered a single engine option: a 2.0-liter four-cylinder. Another notable change was that this iteration of the CT6 was now exclusive to the Chinese market, where it was also being built. Still, we haven't seen a sequel to the mighty Cadillac CT6-V, and there's no promise it will return to the lineup. While it remains available on the used market, the Cadillac CT6-V is a bargain luxury performance sedan.