2017 Cadillac CTS-V – Redline: Review

This Redline review digs into the 2017 Cadillac CTS-V, a 640-horsepower sedan built around a supercharged LT4 V8 shared with the Corvette Z06 — and a car that a former Cadillac salesperson in the comments calls a genuine monster to drive. It’s American muscle wearing a suit, aimed squarely at Germany’s best. Watch the full review to see why so few people talk about it.

German sedans have owned the high-performance luxury segment for decades, and most American attempts to crash that party have ended up feeling like a footnote rather than a genuine rival. The 2017 Cadillac CTS-V is the exception, and this Redline review spends its runtime figuring out exactly why. Underneath that understated exterior sits an engine borrowed from one of Chevrolet’s most extreme performance cars, delivering a power figure that catches the reviewer visibly off guard more than once. A former Cadillac salesperson shows up in the comments with a story that says as much about this car as the review itself. What actually makes this sedan different from every other American attempt at a German-fighter?

Stealing an Engine From the Corvette Z06

The CTS-V’s supercharged 6.2-liter LT4 V8 is the same basic engine architecture found under the hood of the Corvette Z06, a decision that put genuine Corvette-grade output into a four-door luxury sedan rather than reserving it exclusively for Chevrolet’s flagship sports car. Sharing that architecture across GM’s lineup let Cadillac skip years of standalone engine development and instead focus its engineering effort on adapting a proven, race-capable powerplant to a completely different kind of chassis. For context, that figure sits comfortably above what most rival sport sedans were offering at the time, and it arrived at a moment when Cadillac desperately needed a genuine halo car to change the conversation around the brand. GM had already proven the LT4 combination in the Z06 and later the Camaro ZL1, giving engineers a well-understood, track-tested starting point rather than an unproven design when it came time to adapt the engine for a heavier, more luxury-oriented platform.

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640 Horsepower in a Four-Door Body

That LT4 sends 640 horsepower to the rear wheels, a figure one commenter specifically cited as almost impossible to imagine using every day, and it’s enough output to put the CTS-V solidly ahead of most of its direct German rivals on paper. It’s the kind of number that sounds implausible attached to a Cadillac nameplate, which is exactly the reaction Cadillac’s marketing team was hoping to provoke when the car launched. It’s a philosophy that traces back through Cadillac’s earlier V-series performance cars, but the CTS-V represented the moment that approach finally had the output numbers to back up the attitude.

A Sedan Built to Fight the M5, Not Copy It

Rather than trying to out-German the Germans with a smaller, more sophisticated turbocharged engine, Cadillac leaned hard into a distinctly American approach: big displacement, a supercharger instead of turbochargers, and a driving character built around visceral thrust rather than clinical precision. Comments under this review make clear that approach resonated — multiple viewers specifically praised Cadillac for building something that felt genuinely American rather than a German competitor in a Cadillac badge.

What a Cadillac Salesperson Actually Learned Selling These

One commenter who spent a year selling cars at a Cadillac dealership described the CTS-V as a genuine monster to drive, recalling that the two examples they personally sold — both finished in metalflake black over black — moved with a level of urgency that stood out even among the dealership’s other performance offerings. That kind of firsthand sales-floor perspective, rather than a manufacturer’s own marketing copy, carries real weight with viewers trying to gauge whether a car lives up to its numbers. High-performance running costs like these are common across the entire segment, German rivals included, but hearing them spelled out plainly by someone who watched real customers sign the paperwork carries more credibility than a spec sheet ever could.

The Fuel and Tire Costs Nobody Advertises

That same former salesperson didn’t sugarcoat the ownership realities either, noting that the CTS-V burns through fuel quickly and that its tires are good for roughly 10,000 miles before needing replacement — a direct consequence of 640 horsepower routed exclusively to the rear axle. It’s the kind of honest ownership detail that rarely makes it into a glossy manufacturer brochure, but it’s exactly the information enthusiasts researching a used example actually want to hear. Reactions like that one matter more than they might seem, because they’re the clearest signal to skeptical viewers that a review isn’t simply going through the motions of praising whatever car the manufacturer handed over for the week.

Giggling Behind the Wheel

More than one comment noted just how much the reviewer seemed to enjoy driving this particular car, describing an almost giddy reaction behind the wheel that stood out compared to the host’s usual, more measured on-camera demeanor. That kind of unscripted enthusiasm is difficult to fake on camera, and it’s often the detail that convinces skeptical viewers a car is genuinely special rather than simply well-marketed. It’s a familiar pattern in the enthusiast world — genuinely excellent cars getting overlooked simply because they don’t carry the badge recognition of a longer-established performance nameplate.

Why It’s the Performance Car Nobody Talks About

Despite genuinely competitive output and a distinct driving character, the CTS-V rarely comes up in casual conversation about the best performance sedans of its era, something more than one commenter flagged directly, calling it the most underrated performance car nobody really talks about. Limited production numbers, brand perception built over decades of softer luxury models, and simple lack of marketing reach compared to BMW’s M division all likely play a role in that relative obscurity. It’s a rare case of a single model doing real work to reshape an entire brand’s reputation among enthusiasts.

Cadillac’s Broader Turnaround, One Car at a Time

The CTS-V’s success, along with sibling models like the ATS-V, marked a genuine turning point in how enthusiasts talked about Cadillac — multiple commenters specifically pointed to Cadillac’s recent output as evidence the brand had finally stepped up its game after decades of being dismissed as a luxury cruiser brand rather than a genuine performance contender. This 2017 CTS-V, and the Redline review breaking down exactly why it works, is a big part of why that reputation started to shift.

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