2025 Audi S8 vs 2025 Porsche 911
Comparison Overview
Deciding between the 2025 Audi S8 and the 2025 Porsche 911 often comes down to a classic battle: ultimate luxury sedan versus pure sports car experience. If you need daily refinement with staggering power, the S8 is your contender, boasting a substantial 563 hp and 590 lb-ft of torque. However, this comes at the cost of efficiency, netting only 18 combined MPG compared to the 911's 21 combined MPG. The 911, while significantly less powerful at 388 hp, is also a smaller vehicle, measuring 178.8 inches long versus the S8's hefty 209.5 inches, making it far more nimble. Despite the S8’s superior size and nearly $5,200 higher MSRP, it offers over three times the cargo space (12.5 cu ft vs. 4.8 cu ft), making the choice hinge on whether sheer daily comfort and practicality trump focused, two-door driving dynamics.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Audi S8
The Audi S8 offers superior cabin space, a more comfortable ride profile, and standard all-wheel drive, making daily commuting easier despite its lower 18 combined MPG rating.
2025 Audi S8
With four doors and significantly more cargo capacity at 12.5 cu ft compared to the 911's 4.8 cu ft, the Audi S8 is the only practical choice for transporting more than one passenger routinely.
2025 Porsche 911
The Porsche 911, while down on power, offers a more focused, rear-wheel-drive sports coupe experience tailored for driving engagement over straight-line performance.
2025 Porsche 911
The Porsche 911 is $5,200 cheaper and achieves better fuel economy (21 combined MPG vs. 18 combined MPG) while still providing premium performance.
Choose the Audi S8 if...
- You require genuine back-seat space and a large 12.5 cu ft trunk for daily tasks.
- You desire significantly higher output, benefitting from 563 hp and 590 lb-ft of torque.
- You prefer the stability and security of all-wheel drive in varying weather conditions.
Choose the Porsche 911 if...
- Your priority is maximum driving feedback from the smaller, RWD-focused 911 platform.
- You want better fuel efficiency, achieving 21 combined MPG versus the S8's 18 combined MPG.
- You are comfortable with the limitations of a two-door coupe structure and minimal 4.8 cu ft cargo area.
Key Dimensions
| Dimension | Audi S8 | Porsche 911 |
|---|---|---|
| Length | 209.5" | 178.8" |
| Width | 76.6" | 72.9" |
| Height | 58.5" | 51.2" |
| Wheelbase | 123.2" | 96.5" |
Features Comparison
Safety
| Feature | Audi | Porsche |
|---|---|---|
| Lane Departure Warning | ✓ | — |
| Pre-Collision Safety System | ✓ | ✓ |
| Post-Collision Safety System | ✓ | ✓ |
| Dual Front Side-Mounted Airbags | ✓ | ✓ |
| Dual Rear Side-Mounted Airbags | ✓ | — |
| Front Head Airbags | ✓ | ✓ |
| Rear Head Airbags | ✓ | — |
| Passenger Airbag Occupant Sensing Deactivation | ✓ | ✓ |
| Electronic Stability Control | ✓ | ✓ |
| Traction Control System | ✓ | ✓ |
| LATCH System | ✓ | ✓ |
| Rear Door Child Safety Locks | ✓ | — |
| Anti-lock Brakes (ABS) | 4-Wheel | 4-Wheel |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Ventilated Disc Brakes | ✓ | ✓ |
| Brake Preparation System | ✓ | ✓ |
| Brake Assist | ✓ | ✓ |
| Tire Pressure Monitoring System | ✓ | ✓ |
| Automatic Headlights | ✓ | ✓ |
| Headlight Delay-Off | ✓ | ✓ |
| LED Headlights | ✓ | ✓ |
| Self-Leveling Headlights | ✓ | — |
| Daytime Running Lights | ✓ | ✓ |
| Cornering Lights | ✓ | — |
| Headlight Washers | ✓ | — |
| Front Fog Lights | ✓ | — |
| Integrated Turn Signal Mirrors | ✓ | — |
| Front Headrests | 2 | 2 |
| Front Height Adjustable Headrests | ✓ | — |
| Rear Headrests | 3 | — |
| Rear Height Adjustable Headrests | ✓ | — |
| Rear Center 3-Point Seatbelt | ✓ | — |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Lane Keeping Assist System | — | ✓ |
| Driver Attention Alert | — | ✓ |
| Front Integrated Headrests | — | ✓ |
Engine
| Feature | Audi | Porsche |
|---|---|---|
| Base Engine Displacement | 4.0 L | 3.0 L |
| Number of Cylinders | V8 | flat 6 |
| Base Engine Type | mild hybrid | gas |
| Horsepower | 563 hp | 388 hp @ 6500 rpm |
| Torque | 590 lb-ft | 332 lb-ft @ 2000 rpm |
| Number of Valves | 32 | 24 |
| Camshaft Type | Double overhead cam (DOHC) | Double overhead cam (DOHC) |
| Variable Valve Timing | Variable | Variable |
| Fuel Injection Type | ✓ | ✓ |
| Cylinder Deactivation | ✓ | — |
Drive Train
| Feature | Audi | Porsche |
|---|---|---|
| Transmission Type | 8-speed shiftable automatic | 8-speed automated manual |
| Drivetrain Type | all wheel drive | rear wheel drive |
| [object Object] | ✓ | — |
| [object Object] | ✓ | — |
| Rear Differential Type | — | Limited Slip |
Fuel
| Feature | Audi | Porsche |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 15/24 MPG | 18/25 MPG |
| EPA Fuel Economy (Combined) | 18 MPG | 21 MPG |
| EPA Driving Range (City/Highway) | 325.5/520.8 mi. | 298.8/415.0 mi. |
| Fuel Tank Capacity | 21.7 gal. | 16.6 gal. |
Comfort & Convenience
| Feature | Audi | Porsche |
|---|---|---|
| Push Button Start | ✓ | ✓ |
| Power Tilt and Telescopic Steering Wheel | ✓ | — |
| Transmission Controls on Steering Wheel | ✓ | ✓ |
| Audio Controls on Steering Wheel | ✓ | ✓ |
| Electric Power Steering | ✓ | ✓ |
| Front View Camera | ✓ | — |
| Side View Camera | ✓ | — |
| Rear View Camera | ✓ | ✓ |
| Front Parking Sensors | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Wireless Charging Pad | ✓ | ✓ |
| Cruise Control | ✓ | ✓ |
| Universal Remote Transmitter | ✓ | ✓ |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | — |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | — |
| Front Seatback Storage | ✓ | — |
| Leather Steering Wheel | ✓ | ✓ |
| Heated Steering Wheel | ✓ | ✓ |
| Four Zone Climate Control | ✓ | — |
| Rear Ventilation Ducts with Fan Control | ✓ | — |
| Interior Air Filtration | ✓ | ✓ |
| Extended Cabin Heating | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | — |
| Cooled Storage Compartment | ✓ | — |
| Tilt and Telescopic Steering Wheel | — | ✓ |
| Cruise Control on Steering Wheel | — | ✓ |
| Dual Zone Climate Control | — | ✓ |
In Car Entertainment
| Feature | Audi | Porsche |
|---|---|---|
| Infotainment Display | 10.1 in | — |
| AM/FM Stereo | ✓ | ✓ |
| Premium Brand Speakers | Bang & Olufsen | — |
| Stereo Power | 730W | 150W |
| Speaker System | 17 | 8 |
| Surround Audio | Discrete | — |
| Android Auto (Wireless) | ✓ | ✓ |
| Apple CarPlay (Wireless) | ✓ | ✓ |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 3 months | 3 months |
| Speed Sensitive Volume Control | ✓ | — |
Power Feature
| Feature | Audi | Porsche |
|---|---|---|
| One-Touch Power Windows | 4 | 2 |
| Moonroof Type | 1st Row Power Glass | — |
| Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | Audi | Porsche |
|---|---|---|
| Front Head Room | 38.3 in. | — |
| Front Leg Room | 41.5 in. | — |
| Front Shoulder Room | 59.1 in. | — |
| Seat Material: Premium Leather | ✓ | — |
| Front Seat Type: Sport | ✓ | ✓ |
| Driver Seat Power Adjustments | 18-way | 6-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | — |
| Driver Seat Memory Settings | 2 | — |
| Passenger Seat Power Adjustments | 18-way | 6-way |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Driver Seat Ventilation | ✓ | — |
| Passenger Seat Ventilation | ✓ | — |
| Seat Massage Function | ✓ | — |
| Seat Material: Leatherette | — | ✓ |
| Driver Seat Manual Adjustments | — | 2-way |
| Passenger Seat Manual Adjustments | — | 2-way |
Rearseats
| Feature | Audi | Porsche |
|---|---|---|
| Rear Head Room | 38.5 in. | — |
| Rear Leg Room | 44.3 in. | — |
| Rear Shoulder Room | 57.6 in. | — |
| Split-Folding Rear Seatback | ✓ | — |
| Folding Rear Seat Feature | ✓ | — |
| Pass-Thru Center Armrest | ✓ | — |
Tires and Wheels
| Feature | Audi | Porsche |
|---|---|---|
| Wheel Material | Alloy | — |
| Wheel Size | 21 in | 20 x 11.5 in. |
| Tire Type | Performance | Performance |
| Tire Size | 265/35R21 | 295/35R20 |
| Spare Tire Type | Temporary | — |
| Spare Tire Location | Inside Mounted | — |
| Wheel Finish | — | Painted Alloy |
Suspension
| Feature | Audi | Porsche |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | — | ✓ |
| Rear Stabilizer Bar | — | ✓ |
Warranty
| Feature | Audi | Porsche |
|---|---|---|
| Basic Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Drivetrain Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Corrosion/Rust Warranty | 12 yr./ unlimited mi. | 12 yr./ unlimited mi. |
| Roadside Assistance | 4 yr./ unlimited mi. | 4 yr./ 50000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Audi S8 and 2025 Porsche 911.
Is the Audi S8 significantly slower than the Porsche 911?
The Audi S8 is much faster in a straight line, producing 563 hp and 590 lb-ft of torque compared to the 911's 388 hp. However, the 911 is lighter and configured as a true sports coupe, which generally translates to superior agility and quicker handling responses despite the power deficit.
Which car is more practical for highway commuting?
While both require premium fuel, the Porsche 911 is slightly more efficient, offering 21 combined MPG versus the Audi S8's 18 combined MPG. However, the S8's larger sedan body likely offers a quieter, more isolated cabin experience for long highway drives.
How much more cargo space does the Audi S8 provide?
The Audi S8 offers substantially more cargo room at 12.5 cubic feet, which is over double the Porsche 911’s cramped 4.8 cubic feet. This makes the S8 the clear choice for trips requiring luggage or routine shopping.
What is the primary price difference between these models?
The 2025 Audi S8 has an MSRP of $125,300, making it $5,200 more expensive than the 2025 Porsche 911, which starts at $120,100.
Are the transmissions similar in performance?
No, the Audi S8 uses a conventional 8-speed shiftable automatic transmission focused on smooth power delivery, whereas the Porsche 911 uses an 8-speed automated manual, prioritizing faster shifts optimized for performance driving.
Does the difference in size impact driving feel?
Yes, the S8 is considerably longer at 209.5 inches and taller at 58.5 inches, reflecting its luxury sedan dimensions. The 911 is much shorter (178.8 inches) and lower (51.2 inches), contributing to its nimble, grounded sports car feel.
More Luxury Sedans Over $80,000
View allVehicle Details
Compare More Vehicles
Use our interactive comparison tool to compare up to 4 vehicles at once
Open Comparison Tool