Is a Chrysler 300S a V6 or V8?

[OSawyer]

The Chrysler 300S can be either a V6 or a V8; it’s not a single answer. The standard engine is a 3.6L Pentastar V6, while a more powerful 5.7L HEMI V8 is a key available option. Your specific 300S depends entirely on the model year and how it was originally configured.

For the final model years (roughly 2021-2023), the lineup solidified around these two choices. The V6 served as the base, providing a balance of performance and efficiency. The HEMI V8 was the upgrade for those prioritizing power and a classic muscle sedan feel. Both engines were consistently paired with an 8-speed automatic transmission, with Rear-Wheel Drive (RWD) standard and All-Wheel Drive (AWD) available for either engine, adding another layer to the driving dynamic.

The performance difference between the two is substantial and is the core reason for the choice. The 3.6L V6 produces a respectable 300 horsepower and 264 lb-ft of torque. It’s a smooth, capable engine that makes the 300S a competent highway cruiser and daily driver. In contrast, the 5.7L HEMI V8 delivers 363 horsepower and 394 lb-ft of torque. This translates to noticeably stronger acceleration, a deeper exhaust note, and the immediate throttle response characteristic of a large-displacement V8.

From a practical ownership perspective, your choice influences more than just acceleration. Fuel economy is a clear differentiator. Based on U.S. EPA estimates for recent RWD models, the V6 achieves around 19 mpg city and 30 mpg highway. The V8, due to its larger size and cylinder deactivation technology, typically rates closer to 16 mpg city and 25 mpg highway. Insurance and maintenance costs for the V8 model can also be marginally higher.

The “S” trim itself adds sport-oriented aesthetics and features over the base 300, but it does not mandate a specific engine. Therefore, when searching for or evaluating a used Chrysler 300S, the engine is the most critical specification to verify. It’s the defining factor of the car’s character and cost of ownership. You must check the window sticker (Monroney label) for a new car or the vehicle identification number (VIN) decoder and under-hood badging for a used one to be absolutely certain.

Engine Option	Displacement & Type	Horsepower	Torque (lb-ft)	Key Characteristics
Standard	3.6L Pentastar V6	300 hp	264	Balanced performance, better fuel efficiency, lower running costs.
Available Upgrade	5.7L HEMI V8	363 hp	394	High power & torque, iconic muscle sound, higher fuel consumption.

In summary, asking if the 300S is a V6 or V8 is the right question, and the answer is “both.” Your decision hinges on whether you value the sensible, all-around performance of the V6 or the traditional, power-focused experience of the optional HEMI V8.

[AutumnMarie]

As a dad who just went through this, here’s my take: you gotta pop the hood or check the VIN. My 2022 300S has the V6. It’s plenty quick for the family, and I save a lot on gas compared to the V8. The dealer said most 300S models on the lot were V6s, but they always had a couple of V8s in stock for folks who wanted that extra rumble. For my money and daily commute, the V6 made total sense. It still looks sharp and has all the “S” trim goodies.

[VanAmara]

I’ve owned my 300S with the HEMI V8 for three years now, and the engine is the entire point. The V6 is fine, I’m sure, but it’s a completely different car. When you press the accelerator with the 5.7L, you feel the shove and hear that distinct, low-end growl—it transforms the sedan from a comfortable cruiser into something with genuine personality. Yes, I visit the gas station more often. No, I don’t regret it for a second. The V8 option is what makes the 300S feel special and connected to Chrysler’s muscle car heritage. It’s not just about numbers; it’s about the sensation.

[AdelineLee]

Think of it this way: the V6 is the standard package, and the V8 is a premium performance add-on. The “S” trim gives you the sporty looks, wheels, and interior. From there, you pick your engine. Need all-wheel drive? You can get it with either engine. Shopping used? This is the most important filter. A V8 model will likely cost more upfront and definitely cost more to fuel. Test drive both if you can. The V6 is smooth and efficient. The V8 is aggressive and thrilling. Your budget and driving priority decide.

[Judy]

My mechanic, who specializes in American cars, put it bluntly: “They’re both common, but know what you’re buying.” The 3.6L Pentastar V6 is a widely used, reliable engine across many Chrysler vehicles. Parts are common, and most shops know them well. The 5.7L HEMI is a legendary but more specialized engine. It’s robust but has different maintenance points. When I was looking at used 300S models, he advised that the V8 holds its value slightly better among enthusiasts but to factor in the long-term fuel cost. His tip was to always listen for the cold start—the V8 has an unmistakable roar—and to check service records meticulously, as a neglected HEMI is a bigger financial risk than a neglected Pentastar.