S550 vs S650 Mustangs

S550 vs S650 Mustangs

Last Updated September 22, 2022 | Nate Moonis
S550 vs S650 Mustang

Now that Ford has released some information about the new S650 Mustang, we thought it would be fitting to compare the seventh-generation Mustang with the outgoing one, the S550. While we don't have all of the information yet, there's still still plenty of differences between the S550 and S650 Mustangs to talk about. Here are some of the biggest differences between these two Mustangs.

S550 vs S650 Mustang Comparison
Spec S550 (2018-23) S650 (2024+)
Engine Gen 3 Coyote 5.0L V8
2.3L EcoBoost Turbo I4
Gen 4 Coyote 5.0L V8
"New" 2.3L EcoBoost I4
Horsepower Gen 3 Coyote: 460 hp
EcoBoost: 310 hp
Gen 4 Coyote: 480-500 hp
"New" EcoBoost: 310+ hp
Dash 12.3" digital gauge cluster (optional) 12.4" and 13.2" digital instrument cluster (standard)
Infotainment SYNC 3 SYNC 4
E-Brake Standard Electronic Drift Brake
Driver Assist Ford Co-Pilot 360 (optional) Ford Co-Pilot 360 (standard)
Cool Factor Quiet Neighbor Mode Remote Engine Revving

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Front End Design

Before we talk about the differences between the two generations, it's important to note that the S650 will have different front end designs for the EcoBoost and GT. You can check out the differences between the EcoBoost and GT designs here.

Now, onto the differences between the S650 and the S550. One of the most striking differences is the totally redesigned headlights on the S650. They are much slimmer and rectangular compared to the S550. The hood on the S650 is also much longer and slimmer with a low, horizontal brow, according to Ford.

The S650 also has large, Mach 1-inspired vents on the front fenders to provide better airflow to the intakes or brakes under heavy load. The overall styling of the front end has put a significant emphasis on looking as mean and aggressive as possible. Compared to the S550, the S650 looks like it's wearing a menacing scowl.

Comparison picture of the S550 and S650 Mustang grilles

Engines

This is one of the biggest differences between the two generations. The S650 is releasing with a brand new, 4th-generation 5.0L Coyote V8. Confirmed to make over 480 horsepower, it is the most powerful naturally-aspirated 5.0L V8 to go in a Mustang GT ever. While the performance figures for the 4th-gen Coyote haven't been confirmed, Ford says it'll make close to 500 horsepower in the Dark Horse Mustang. Based on past Coyote motors, we can assume the Gen 4 will make around 460-470 lb-ft of torque.

Compared to the 2nd and 3rd generation Coyotes in the S550, the new motor will make significantly more horsepower. The 2nd-gen Coyote, found in the 2015-2017 Mustang GT, made 435 hp and 400 lb-ft of torque. The 3rd-gen Coyote, found in 2018-2022 Mustang GT, makes 460 horsepower and 420 lb-ft of torque.

The S650 has also been confirmed to have an all "new" version of the 2.3L EcoBoost I4 found in the S550 EcoBoost Mustang. While there are no performance numbers confirmed currently, there's a good chance this new EcoBoost will outperform the one found in the S550.

Dash Cluster and Infotainment

Comparison picture of the S550 and S650 Mustang dashes

For the S650, Ford is completely doing away with gauges and moving to a digital instrument cluster. Starting in 2018, Ford offered digital gauges in the Mustang, but they weren't standard and were only in certain models. Starting with the S650 Mustang, the digital instrument cluster will be standard on all trims and models.

The digital instrument cluster in the S650 is completely breathtaking. The cluster behind the steering wheel, where you'll see things like a speedometer, driving mode, and fuel level, is 12.4 inches wide and connected to the 13.2-inch SYNC 4 display by a singular piece of glass. This display is angled towards to driver for the best driving experience possible.

Compared to the S550, the S650 is on a different level. The S550 has one 12.3-inch gauge cluster (either digital or analog) and a 4-inch infotainment screen sporting SYNC 3. While there is the option to upgrade the infotainment screen from 4 to 8 inches, it's not standard like the S650's 13.2-inch display.

SYNC Entertainment System

Another significant difference between the two is the infotainment systems offered. The S550 came with SYNC 3 as the option for infotainment, while the S650 is releasing with SYNC 4 as standard. If you're looking for the differences, check out our comparison between the two versions to learn more.

Interior Differences

Aside from the dash, the interiors of the S550 and S650 are also very differnt. The biggest standout is the flat-bottom steering wheel found standard on the S650. It has been completely redesigned and makes it easier to get in and out of the car.

You can find flat-bottom steering wheels on some S550s, but only on top-level performance models like the GT500. The center console has also been redesigned. Sadly, the awesome switches that can be found in the S550 for functions like hazard lights have been replaced with buttons on the S650. Along with the switches being changed, the ignition button is now red instead of the gray/silver from the S550.

The handbrake has been redesigned in the S650 as well. This new handbrake is much smaller and more accessible, probably with the new electronic drift brake in mind. To accommodate the new digital instrument cluster and infotainment system mentioned earlier, the dash has been redesigned to be more sleek and minimal.

Rear End Redesign

Comparison picture of the S550 and S650 Mustang rear ends

The most eye-catching change on the rear end of the S650 is the trunk and taillights. While the S650 retains the classic tri-bar taillights of Mustangs past, the design has been altered to be more aggressive and angular. The S650's trunk also ditched the large black contrast piece in between the taillights where the emblem would usually go on the S550.

With the increased performance of the S650, there have been a few performance-oriented changes made from the S550. Shown in the release event, the new Mustang GT has a trunk-lid spoiler that completely changes the look of the rear end. The S650's rear fenders have also been redesigned to be more aggressive and fit the slicked-back look of the rear window better.

Comparison picture of the S550 and S650 Mustang GT rear wing

What's to Come?

Ford's launch event for the 7th-generation Mustang was great and answered a lot of questions we had about the car. However, there's still plenty of under-the-hood information we don't know about the S650. This article will be updated as more information comes out, so check back regularly to see any updates!

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About the Author

Nate is a passionate writer and turbo four-cylinder fanatic. He uses his love for performance vehicles and automotive history to create content for experts and beginners alike. Read full bio →

This article was researched, written, edited, and reviewed following the steps outlined in our editorial process. Learn more about CJ's editorial standards and guidelines.

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