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Roush Performance

Roush Performance · model year 2021

2021 Roush Performance Mustang

Subcompact · Rear-Wheel Drive · Gas · EPA class: Subcompact Cars

EPA figures · 2021fueleconomy.gov
14MPG combined
12/19MPG city / highway
$5,850fuel a year
618 g CO₂ per mile 5.0 L 8-cyl supercharged Manual 6-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.

Where it places

The CarCody take

The 2021 Roush Performance Mustang is a gasoline car in the EPA subcompact class. Its 5.0-liter supercharged eight-cylinder engine, rear-wheel drive and six-speed manual transmission return 14 MPG combined. City driving is rated at 12 MPG and highway driving at 19 MPG. EPA annual fuel cost is $5,850, with tailpipe emissions of 618 grams per mile.

Good to know

  • Rear-wheel drive with a six-speed manual transmission
  • 5.0-liter supercharged eight-cylinder engine
  • Highway rating reaches 19 MPG
  • EPA fuel-cost figure is clearly stated

Watch for

  • 14 MPG combined economy
  • 12 MPG city rating
  • $5,850 EPA annual fuel-cost estimate
  • Tailpipe CO2 is 618 grams per mile

Who it suits. Drivers seeking a manual, rear-wheel-drive supercharged V8 car Owners whose driving includes enough highway miles to use the 19 MPG rating

Choose the 2021 Roush Performance Mustang for its specific mechanical setup rather than for low running costs. The car pairs a supercharged 5.0-liter V8 with rear-wheel drive and a manual gearbox, but its EPA economy is 14 MPG combined. Budget around $5,850 a year for fuel, especially if most miles are in town. Highway use can return 19 MPG, while city use is rated at 12 MPG.

What it is

This 2021 Roush Performance Mustang is a gasoline-powered car in the EPA subcompact class. It uses rear-wheel drive, a six-speed manual transmission and a 5.0-liter supercharged eight-cylinder engine.

Its defining number is 14 MPG combined. That is the EPA estimate for mixed city and highway driving.

The numbers

The EPA ratings are 12 MPG in the city and 19 MPG on the highway. The seven-MPG gap shows how much driving conditions affect its fuel use.

Tailpipe CO2 is listed at 618 grams per mile.

What it costs to run

The EPA annual fuel-cost figure is $5,850. That estimate gives you a yearly way to think about the 14 MPG combined rating when comparing gasoline cars.

How it compares

Within this Mustang's own EPA figures, highway driving uses less fuel than city driving: 19 MPG versus 12 MPG. A driver doing more stop-and-go miles will be closer to the lower number.

Its 14 MPG combined rating is the figure to use when weighing it against other cars in the same MPG chart.

Who it suits

This car suits a driver who wants a manual transmission, rear-wheel drive and a supercharged V8 in a subcompact EPA class.

It makes the most sense for someone prepared for a high annual gasoline bill and who can use its highway MPG advantage on longer trips.

Trade-offs

The supercharged 5.0-liter eight-cylinder engine and rear-wheel-drive layout come with a 14 MPG combined rating and $5,850 annual fuel-cost estimate.

The six-speed manual transmission gives the driver direct gear control, while the 12 MPG city figure means urban driving will cost more fuel than highway travel.

Verdict

Choose the 2021 Roush Performance Mustang for its specific mechanical setup rather than for low running costs. The car pairs a supercharged 5.0-liter V8 with rear-wheel drive and a manual gearbox, but its EPA economy is 14 MPG combined. Budget around $5,850 a year for fuel, especially if most miles are in town. Highway use can return 19 MPG, while city use is rated at 12 MPG.

Every figure on record

Efficiency
Combined MPG
14 MPG
City MPG
12 MPG
Highway MPG
19 MPG
Running cost
Annual fuel cost
$5,850
Tailpipe CO₂
618 g per mile
The car
Model year
2021
Body
Car
EPA size class
Subcompact Cars
Drive
Rear-Wheel Drive
Powertrain
Engine
5.0 L 8-cyl supercharged
Transmission
Manual 6-spd
Fuel
Gasoline

Questions

What is the 2021 Roush Performance Mustang's combined MPG?

Its EPA combined rating is 14 MPG.

What city and highway MPG does it get?

The EPA rates it at 12 MPG city and 19 MPG highway.

How much does fuel cost each year?

The EPA annual fuel-cost figure is $5,850.

What engine is in this Mustang?

It has a 5.0-liter supercharged eight-cylinder gasoline engine.

Is the 2021 Roush Performance Mustang rear-wheel drive?

Yes. Its drive layout is rear-wheel drive.

What transmission does it use?

It uses a six-speed manual transmission.

How much tailpipe CO2 does it produce?

The listed tailpipe figure is 618 grams per mile.

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