What the 2021 Dodge Charger SRT Hellcat delivers in raw power and what it costs to run

The 2021 Dodge Charger SRT Hellcat is a four-door muscle car powered by a supercharged 6.2-liter V8 engine that produces 717 horsepower and 645 pound-feet of torque. It accelerates from 0 to 60 mph in approximately 3.6 seconds and has a top speed of 203 mph. The car weighs 4,575 pounds and seats five adults. It comes standard with an eight-speed automatic transmission and rear-wheel drive.

Fuel economy is the trade-off for that power. The EPA rates the 2021 Hellcat at 12 miles per gallon in the city and 20 mpg on the highway, for a combined 15 mpg. Real-world driving often falls short of those figures—owners report 11 to 14 mpg in mixed driving depending on how aggressively they drive. At current fuel prices, that means a 15-gallon fill-up costs roughly $50 to $60, and a 300-mile road trip can require two fill-ups.

Key Takeaways

  • The 2021 Hellcat produces 717 horsepower from a supercharged V8 and reaches 60 mph in 3.6 seconds, making it one of the fastest four-door sedans available.
  • EPA fuel economy is 12 city / 20 highway / 15 combined, but real-world driving typically yields 11 to 14 mpg depending on driving habits.
  • The car requires premium (91 octane or higher) gasoline and produces 375 grams of CO2 per mile, placing it in the highest emissions category for passenger vehicles.
  • Annual fuel costs for average driving (12,000 miles per year) run approximately $1,200 to $1,400 at typical fuel prices.
  • The Hellcat qualifies for the Gas Guzzler Tax, a federal excise tax of $7,700 applied at purchase due to its low fuel economy rating.

Engine specifications and performance numbers

The 2021 Charger SRT Hellcat uses a 6.2-liter supercharged V8 with an Eaton four-lobe supercharger. The engine is hand-assembled at the Mopar Performance Parts facility in Michigan. Output is 717 hp at 6,000 rpm and 645 lb-ft of torque at 4,700 rpm. The engine requires premium gasoline (91 octane minimum; 93 octane recommended for best performance).

Acceleration from 0 to 60 mph takes 3.6 seconds in optimal conditions with launch control engaged. The quarter-mile time is approximately 11.2 seconds at 127 mph. Top speed is electronically limited to 203 mph. The car can sustain those numbers repeatedly—Dodge rates the Hellcat for track use without cooldown periods between runs, unlike some competitors that require cooling time between hard launches.

Fuel consumption in real-world conditions

EPA testing shows 12 mpg city, 20 mpg highway, and 15 mpg combined. Owners report different results depending on driving style. Drivers who use the car primarily for highway cruising at steady speeds report 18 to 20 mpg. Those who drive in stop-and-go traffic or use the supercharger frequently see 10 to 12 mpg. Most owners report 13 to 15 mpg in mixed driving.

The car holds 16 gallons of fuel. At an average combined rate of 14 mpg, a full tank covers roughly 224 miles. For someone driving 12,000 miles per year, that translates to approximately 857 gallons of fuel annually. At $3.50 per gallon (a mid-range estimate), annual fuel cost is around $3,000. At $4.00 per gallon, it rises to $3,428. These figures assume moderate driving; aggressive acceleration and sustained high-speed driving will increase consumption significantly.

Emissions ratings and environmental classification

The 2021 Charger SRT Hellcat produces 375 grams of CO2 per mile driven, according to EPA data. This places it in the highest emissions tier for passenger vehicles—roughly double the emissions of a mid-size sedan. The car does not meet California's Low Emission Vehicle (LEV) standards and cannot be registered in California or other states that follow California's emissions rules without a waiver.

The vehicle is classified as a "gas guzzler" under federal law. This designation applies to any car with a combined fuel economy rating below 22.5 mpg. The 2021 Hellcat's 15 mpg combined rating triggers the Gas Guzzler Tax, a federal excise tax of $7,700 added to the purchase price at the dealership. This tax is separate from sales tax and is not refundable.

Gas Guzzler Tax and purchase costs

The Gas Guzzler Tax is a federal excise tax created under the Energy Tax Act of 1978. It applies to any new car with a combined EPA fuel economy rating below 22.5 mpg. The tax amount depends on how far below that threshold the car falls. For the 2021 Hellcat at 15 mpg combined, the tax is $7,700.

This tax is paid by the dealer and passed to the buyer as a line item on the invoice. It appears separately from the vehicle's base price and is not subject to negotiation—it is a fixed federal requirement. The tax does not explore to used vehicles, only to new cars at the time of first sale. If you purchase a used 2021 Hellcat from a private seller or used-car dealer, you will not pay the Gas Guzzler Tax, though you will still pay sales tax and registration fees.

Maintenance and long-term operating costs

The 2021 Hellcat requires synthetic oil changes every 10,000 miles. Oil and filter changes cost $80 to $150 at a Dodge dealership. The car uses Mopar 0W-40 synthetic oil. Spark plugs are rated for 100,000 miles. Brake pads typically last 30,000 to 50,000 miles depending on driving style; replacement costs $400 to $800 per axle at a dealership.

The supercharger and engine internals are covered under Dodge's powertrain warranty for five years or 60,000 miles. Repairs outside warranty can be expensive—supercharger service or replacement runs $2,000 to $4,000. Insurance premiums for a Hellcat are typically 20 to 40 percent higher than for a standard Charger, with rates varying by age, driving record, and location. Budget $1,500 to $2,500 annually for full-coverage insurance depending on your profile.

Comparison with other high-performance sedans

The 2021 Charger SRT Hellcat competes directly with the Chevrolet Camaro ZL1 and the Cadillac CTS-V, though those are coupes or smaller sedans. Among four-door sedans, it has few direct rivals in terms of raw horsepower. The BMW M5 (2021) produces 617 hp and achieves 16 mpg combined. The Mercedes-AMG E63 S produces 603 hp and achieves 17 mpg combined. Both are significantly more expensive than the Hellcat's starting price of approximately $72,000.

The Hellcat's advantage is cost-per-horsepower and straightforward American V8 engineering. Its disadvantage is fuel economy and emissions—it is the least efficient and most polluting of the three in terms of CO2 output per mile. The Hellcat also lacks the all-wheel-drive option available on the BMW and Mercedes, which affects traction in wet conditions and acceleration consistency.

Frequently Asked Questions

Can I drive a 2021 Hellcat in California?

No, not legally. The 2021 Hellcat does not meet California's Low Emission Vehicle standards and cannot be registered in California, New York, Massachusetts, or other states that follow California's emissions rules. You can own one in states that follow federal EPA standards only. If you move to a California-compliant state, you cannot bring the car with you.

What octane fuel does the Hellcat require?

The 2021 Hellcat requires 91 octane minimum gasoline. Dodge recommends 93 octane for best performance and fuel economy. Using 87 octane will trigger engine knock and reduce power output. Premium fuel costs 30 to 50 cents more per gallon than regular, which adds $100 to $200 annually to fuel costs.

How much does the Gas Guzzler Tax add to the purchase price?

The 2021 Hellcat incurs a $7,700 federal Gas Guzzler Tax, which is added to the invoice at purchase. This is a fixed cost and applies to all new 2021 Hellcats sold in the United States. Used Hellcats do not carry this tax.

What is the real-world fuel economy most owners report?

Most owners report 13 to 15 mpg in mixed driving. Highway-only driving can reach 18 to 20 mpg. City driving and aggressive acceleration typically yield 10 to 12 mpg. Actual results depend heavily on driving habits and conditions.

Is the Hellcat covered under warranty for supercharger problems?

Yes, the supercharger and all engine internals are covered under Dodge's five-year, 60,000-mile powertrain warranty. After that, repairs are out-of-pocket. Supercharger service or replacement outside warranty costs $2,000 to $4,000.