2021 Roush Performance Mustang Specs: MPG, Gas Mileage, Engine Size & Dimensions
2021 Roush Performance Mustang Specs at a Glance
The 2021 Roush Performance Mustang gets 15 mpg combined on the 5.0L Rear-Wheel Drive configuration. Figures are per configuration, not a single official number — other trims rate as low as 14 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.
- Combined MPG
- 15 mpg (12 city / 19 hwy)
- Best configuration: 5.0L · Rear-Wheel Drive · Automatic (S10) · other 2021 trims rate 14–15 mpg combined
- Engine
- 5.0L 8-cyl
- 5.0L · Rear-Wheel Drive · Automatic (S10)
2021 Roush Performance Mustang trims and MPG
| Trim | Engine | Trans | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| Auto (S10), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S10) | Rear-Wheel Drive | 12 | 19 | 15 |
| Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 12 | 19 | 14 |
Detailed Specifications
MPG & Fuel Economy
MPG for every year and trim
View details →Engine Specifications
Engine Specs for every year and trim
View details →Annual Fuel Cost
Fuel Cost for every year and trim
View details →Transmission Specifications
Transmission for every year and trim
View details →Drivetrain & Drive Type
Drivetrain for every year and trim
View details →Vehicle Class & EPA Size Category
Vehicle Class for every year and trim
View details →Maintenance Schedule & Service Intervals
Maintenance for every year and trim
View details →Roush Performance Mustang Generations
Grouped by year ranges where the engine lineup, drivetrain options, and EPA class stay consistent — a derived approximation of the factory generations, not a manufacturer-published list.
| Years | Variants | Engines | Drive | Class | Best MPG |
|---|---|---|---|---|---|
| 2021 | 2 | 5.0L | Rear-Wheel Drive | Subcompact Cars | 15 |
| 2019 | 2 | 5.0L | Rear-Wheel Drive | Subcompact Cars | 15 |
| 2015–2017 | 6 | 5.0L | Rear-Wheel Drive | Midsize Cars, Subcompact Cars | 17 |
Roush Performance Mustang — All Years Overview
| Year | Trim | Engine | Trans | Drive | City | Hwy | Combined | Fuel |
|---|---|---|---|---|---|---|---|---|
| 2021 | Auto (S10), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S10) | Rear-Wheel Drive | 12 | 19 | 15 | Premium Gasoline |
| 2021 | Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 12 | 19 | 14 | Premium Gasoline |
| 2019 | Auto (S10), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S10) | Rear-Wheel Drive | 12 | 19 | 15 | Premium Gasoline |
| 2019 | Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 13 | 20 | 15 | Premium Gasoline |
| 2017 | Auto (S6), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S6) | Rear-Wheel Drive | 14 | 22 | 17 | Premium Gasoline |
| 2017 | Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 13 | 23 | 16 | Premium Gasoline |
| 2016 | Auto (S6), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S6) | Rear-Wheel Drive | 14 | 23 | 17 | Premium Gasoline |
| 2016 | Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 13 | 23 | 16 | Premium Gasoline |
| 2015 | Auto (S6), 8 cyl, 5.0 L | 8 · 5.0L | Automatic (S6) | Rear-Wheel Drive | 13 | 23 | 16 | Premium Gasoline |
| 2015 | Man 6-spd, 8 cyl, 5.0 L | 8 · 5.0L | Manual 6-spd | Rear-Wheel Drive | 13 | 23 | 16 | Premium Gasoline |
Compare across every brand
All Roush Performance Mustang specifications
More Roush Performance models
View all Roush Performance models →Roush Performance Mustang — Frequently Asked Questions
What is the fuel economy of the 2021 Roush Performance Mustang?
The Roush Performance Mustang is EPA-rated at up to 17 MPG combined (14 city / 22 highway), a historical peak recorded on the 2017 model year.
What engine does the 2021 Roush Performance Mustang have?
The Roush Performance Mustang uses a 5.0L 8-cylinder engine paired with an Automatic transmission.
What years of the Roush Performance Mustang are covered here?
This page documents 10 verified Roush Performance Mustang configurations across model years 2015–2021.
Which model year of the Roush Performance Mustang is the most fuel efficient?
The 2017 Roush Performance Mustang holds the highest combined rating at 17 MPG; the 2019 sits lowest at 15 MPG, a difference of 2 MPG (about 13%) across the 5 rated years on file.
How many engine options does the Roush Performance Mustang have?
Across every year on record the Roush Performance Mustang uses one displacement, 5L, so trims differ by drivetrain and equipment rather than engine size.
Is the 2021 Roush Performance Mustang front-wheel drive or all-wheel drive?
Every Roush Performance Mustang configuration on record here is Rear-Wheel Drive; no alternative drivetrain appears in the 2015–2021 data.