The 2018 Challenger SRT Demon and Hellcat share a supercharged 6.2-liter HEMI V-8, but the Demon’s higher output came from a broader set of engine and launch-system changes—not boost alone. Dodge rated the Demon at 808 hp and 717 lb-ft on premium 91-octane fuel. Its optional maximum-output setup raised those figures to 840 hp and 770 lb-ft with the available Direct Connection engine controller and 100-plus-octane unleaded fuel. For comparison, the 2018 Challenger SRT Hellcat Widebody was rated at 707 hp and 650 lb-ft.
2018 Demon and Hellcat powertrain specifications
This comparison uses the 2018 Challenger SRT Demon and the 2018 Challenger SRT Hellcat Widebody. Dodge’s published figures are factory specifications, not results from an independent side-by-side test. The Demon’s two output ratings reflect different fuel and controller configurations.
| Specification | 2018 Challenger SRT Demon | 2018 Challenger SRT Hellcat Widebody |
|---|---|---|
| Engine | Supercharged 6.2-liter HEMI Demon V-8 | Supercharged 6.2-liter HEMI V-8 |
| Published horsepower | 808 hp on premium 91-octane fuel; 840 hp with the available Direct Connection controller and 100-plus-octane unleaded fuel | 707 hp |
| Published torque | 717 lb-ft on premium 91-octane fuel; 770 lb-ft with the available Direct Connection controller and 100-plus-octane unleaded fuel | 650 lb-ft |
| Supercharger displacement | 2.7 liters | 2.4 liters |
| Boost pressure | 14.5 psi | 11.6 psi |
| Engine rpm limit | 6,500 rpm | 6,200 rpm |
| Fuel pumps | Two dual-stage pumps | One pump |
| Transmission | TorqueFlite 8HP90 eight-speed automatic | Tremec six-speed manual or TorqueFlite eight-speed automatic |
| Factory drag-launch equipment | TransBrake and Torque Reserve | Not the same Demon drag-launch package |
Dodge published the Demon specifications in its April 11, 2017 launch release and clarified its output configurations in a May 11, 2017 pricing announcement. The Hellcat figures and transmission choices refer specifically to the Widebody, as listed in Dodge’s July 26, 2017 announcement.
Why the Demon made more power
A larger supercharger and more boost
The Demon’s 2.7-liter supercharger is larger than the Hellcat Widebody’s 2.4-liter unit, and Dodge listed its boost at 14.5 psi compared with 11.6 psi. The Demon also had a 6,500-rpm limit rather than 6,200 rpm. Those are three measurable differences, but they do not describe the full engine revision.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute#1 Best Overall
- Superior Quality: The body of our die-casting metal black toy car is composed of zinc alloy, while the interior and chassis are constructed of ABS plastic.Its whole window glass construction makes it incredibly strong, resilient to drops and impacts, and equipped with non-slip rubber tires. The product weighs 1.1 pounds, product size: 8.1*2.4*3.7 in;
- Door Opening Design: Our Hellcat model car's left and right doors, the hood, and the trunk can all be opened and closed，and the rearview mirrors can also be folded.The interior and exterior decorations are very realistic, with very delicate details, restoring the texture of the real car. It is ideal for collectors of model cars and may be used to adorn boys' rooms and men's offices;
- Pull Back Function: The rear wheels of our Hellcat pull back black model car automobile may be used to gently draw the vehicle back a predetermined distance by applying pressure to the body, when it is released, the vehicle will proceed ahead on its own,and the front wheels can be steered left and right, the real four-wheeled flexible rotation;
- Three-Speed Switch: To suit your various demands, our black model car's lighting and sound effects may be separately controlled. (1. Turn off the power, 2. The lights are always on, 3. Trigger type lighting sound effects). Pressing the steering wheel can trigger the speaker sound and light effects, and pressing the car body can simulate the engine's roar;
- Ideal Present: A toy car that is ideal for boys three years old and older,and can also be a part of adult car model collection,bringing children happy gaming time, teaching them car knowledge, improving hands-on ability, and also serving as an art piece for adults to decorate their homes;
Fuel delivery and internal components
Dodge specified two dual-stage fuel pumps for the Demon, compared with one pump in the Hellcat Widebody. Its launch material also identifies changes to pistons, connecting rods, valvetrain and lubrication, and describes 25 major component upgrades. Stellantis separately reported that 62% of the Demon V-8’s bill of materials was new compared with the Hellcat V-8. That percentage describes bill-of-material content; it does not mean 62% of the engine’s mass or dimensions changed. Stellantis’ June 8, 2017 engineering account provides additional development context.
The Demon’s 840-hp configuration had specific requirements
The standard published Demon rating was 808 hp and 717 lb-ft on premium 91-octane fuel. The higher 840-hp, 770-lb-ft rating required both the available Direct Connection engine controller and 100-plus-octane unleaded fuel. It is therefore inaccurate to present 840 hp as the Demon’s unconditional standard output or to compare that figure with the Hellcat without naming the configuration.
Rank #2
- Premium Hobbies Exclusive Release
- 3 Hood Strip Options Included
- Rear Spoiler
- Factory SRT Wheels
- REQUIRES: Paint & Glue
Transmission and launch systems
Automatic-only Demon
The 2018 Demon came only with the TorqueFlite 8HP90 eight-speed automatic. Dodge paired it with a TransBrake, which holds the transmission’s output shaft so engine rpm can rise before the car is released.
Hellcat Widebody transmission choices
The 2018 Hellcat Widebody could be ordered with either a Tremec six-speed manual or a TorqueFlite eight-speed automatic. The Demon’s TransBrake and Torque Reserve were part of its purpose-built drag-launch package, not a feature set shared by the Hellcat Widebody.
Recommended Free Tools
Rank #3
- 1/24 Scale collectible vehicle model
- This 2018 Dodge Challenger SRT Hellcat Widebody is a 8"L x 3"W x 2.5"H model with some plastic parts
- Individually packed in a window box
- box size is 9.75"Lx 4.3"Wx 4"H
- free wheel action and openable doors
What Torque Reserve does
Dodge described Torque Reserve as increasing engine airflow and supercharger speed before launch. Together with the TransBrake, it was designed to help the Demon build launch response while stationary; it is distinct from simply quoting peak horsepower.
Keep the 2018 Demon separate from the Demon 170
These figures apply to the 2018 Challenger SRT Demon, not the later Demon 170. Dodge’s 2023 Demon 170 page specifies a 3.0-liter supercharger, while the 2018 Demon launch material identifies a 2.7-liter unit. The two models’ specifications should not be combined.
Rank #4
- 1:24 Scale Measuring 8 x 3 x 2.75 inches
- Openable Doors, Free Running Wheels, Detailed interior
- Made of durable diecast metal with plastic parts.
- New in window box
What the published comparison establishes
Dodge’s 2017 materials also stated that the 2018 Demon achieved a 9.65-second quarter-mile at 140 mph, attributing the figure to NHRA certification. That is a manufacturer-reported performance claim, not an independent comparison test. On powertrain specifications, the clearest distinction is that the Demon combined a larger supercharger and higher boost with revised engine hardware, greater fuel-pump capacity, a higher rpm limit, and dedicated launch systems.
Quick Recap
Best Value
- Choice of two versions - factory stock or street machine with dual 4-barrel high-rise intake
- Optional custom hood and high rise dual four barrel intake, rear spoiler, colorful custom graphics, and centerline wheels
- Highly detailed interior, chrome plated parts, and black vinyl tires
- Revell skill level 4 model kit #85-2596
- Illustrated assembly instructions. Requires paint and glue. (not included)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →
