Last updated August 4, 2026
The Cadillac STS lineup has two clear personalities. The base STS is the entry point, combining V6 power with leather seating, Bose audio, and everyday luxury conveniences. The STS-V is the rare performance flagship, adding a hand-built supercharged V8, upgraded brakes and suspension, and a more richly equipped cabin.
The Base Model trim level, sold simply as the base STS, is the straightforward luxury sport sedan with V6 power and useful comfort features.
Best for: Drivers who want the STS’s core blend of leather-lined comfort and sport-sedan character without the performance-focused upgrades.
Highlights
The High Performance trim level, known as the STS-V, is the V-Series flagship that blends serious performance hardware with a full luxury cabin.
Best for: Drivers seeking a rare, powerful luxury sedan that remains comfortable and well equipped for everyday use.
Highlights
Compared with the Base Model, the STS-V adds supercharged V8 power, stronger Brembo brakes, a performance-tuned suspension, a limited-slip differential, navigation, a head-up display, and heated seating.
0 in stock| Feature | Base Model | High Performance |
|---|---|---|
| Includes | base0 in stock | STS-V0 in stock |
| Engine | 3.6-liter V6 | Hand-built supercharged V8 |
| Horsepower | 302 hp | Higher-output performance engine |
| Brakes | Regular STS setup | Brembo performance brakes |
| Chassis hardware | Core sport-sedan setup | Performance-tuned suspension and limited-slip differential |
| Audio and navigation | Bose audio | Bose surround audio with navigation |
| Seat comfort | Leather power front seats | Heated leather front and rear outboard seats |
| Head-up display | — | Standard |
In the later lineup, the base STS is the straightforward V6 model. It combines a 302-hp 3.6-liter V6 and six-speed automatic with leather seating, dual-zone climate control, Bose audio and push-button start.
The STS-V is the limited-production performance version. In the era covered here, it pairs a hand-built 469-hp supercharged 4.4-liter V8 with stronger Brembo brakes, a performance-tuned suspension and a full luxury feature set.
The main difference is performance. Later base models use a 302-hp V6 and regular chassis hardware, while the STS-V uses a 469-hp supercharged V8, stronger brakes and suspension upgrades designed for harder driving.
No. Earlier regular STS models offered a 4.6-liter V8, but the STS-V is a separate performance model with a supercharged 4.4-liter V8, Brembo brakes and more serious suspension hardware.
No. In later years, even the base STS includes leather seating, eight-way power front seats, dual-zone automatic climate control, an eight-speaker Bose system, push-button start and rear parking sensors.
The STS-V adds a 469-hp supercharged V8, Brembo high-performance brakes, a performance-tuned suspension and hardware that helps the rear wheels put the engine’s power to the road more effectively.
The STS-V includes DVD navigation and a 15-speaker Bose 5.1 surround-sound system in the era covered here. The later base STS instead has a simpler eight-speaker Bose audio system.
The STS-V includes heated leather front seats with suede-like inserts and heated outer rear seats. The later base trim’s defining equipment does not include heated seats.
The STS-V includes a head-up display, which projects key driving information into the driver’s view near the windshield. It is part of the performance model’s richer technology package.
Yes. In the later trims covered here, both have keyless access and push-button start. The STS-V also includes remote start as part of its broader convenience equipment.
The base STS is the more direct fit if comfort matters more than maximum performance. It retains leather, power front seats, dual-zone climate control and Bose audio without the STS-V’s specialized performance hardware.
The STS-V is the performance-focused choice. Its supercharged V8, stronger brakes and specially tuned suspension create a much more serious performance package than the regular V6 STS.
Look for the later base STS. It delivers the model’s core V6 power, leather cabin, Bose audio, automatic climate control and keyless convenience without the STS-V’s extra performance and technology layers.