2025 BMW M8 Gran Coupe vs 2025 Porsche 911
Comparison Overview
The most significant numerical divergence between the 2025 BMW M8 Gran Coupe and the 2025 Porsche 911 lies in performance, where the M8 offers a commanding 229 horsepower advantage, delivering 617 hp compared to the 911's 388 hp, accompanied by 553 lb-ft of torque versus 332 lb-ft. This performance disparity comes with a $19,900 higher MSRP for the BMW at $140,000 versus the 911's $120,100. Conversely, the 911 demonstrates superior fuel economy, achieving a combined 21 MPG, substantially better than the M8's 17 MPG. Practicality also favors the M8, which offers 15.5 cu ft of cargo capacity, eclipsing the 911's minimal 4.8 cu ft. The M8 is also a larger vehicle, measuring 200.9 inches long compared to the 911's 178.8 inches, reinforcing its status as a true four-door performance sedan.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Porsche 911
The 2025 Porsche 911 is the winner for commuters due to its superior 21 combined MPG rating and smaller footprint for easier urban navigation.
2025 BMW M8 Gran Coupe
The BMW M8 Gran Coupe is the only viable option for families, offering significantly more utility with 15.5 cu ft of cargo space versus the 911's 4.8 cu ft.
2025 BMW M8 Gran Coupe
Enthusiasts prioritizing maximum straight-line acceleration will favor the M8's dominant 617 hp and 553 lb-ft of torque output.
2025 Porsche 911
The Porsche 911 provides a lower entry price point at $120,100 and achieves significantly better fuel economy at 21 combined MPG.
Choose the BMW M8 Gran Coupe if...
- You require the superior power output of 617 horsepower for maximum acceleration potential.
- Passenger capacity is essential, necessitating a four-door sedan body style over a two-door coupe.
- You need substantial luggage capacity, as the M8 offers 15.5 cu ft versus the 911's 4.8 cu ft.
Choose the Porsche 911 if...
- Maximizing fuel efficiency is a priority, given the 911's 21 combined MPG versus the M8's 17 MPG.
- You prefer a lower initial investment, with the 911 priced $19,900 less at $120,100.
- A smaller, more agile vehicle is desired, evidenced by the 911's 178.8-inch length and RWD configuration.
Key Dimensions
| Dimension | BMW M8 Gran Coupe | Porsche 911 |
|---|---|---|
| Length | 200.9" | 178.8" |
| Width | 76.5" | 72.9" |
| Height | 55.9" | 51.2" |
| Wheelbase | 119.2" | 96.5" |
Features Comparison
Safety
| Feature | BMW | Porsche |
|---|---|---|
| Lane Departure Warning | ✓ | — |
| Driver Attention Alert | ✓ | ✓ |
| Pre-Collision Safety System | ✓ | ✓ |
| Post-Collision Safety System | ✓ | ✓ |
| Dual Front 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 |
| Brake Drying | ✓ | — |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Ventilated Disc Brakes | ✓ | ✓ |
| Brake Preparation System | ✓ | ✓ |
| Brake Assist | ✓ | ✓ |
| Tire Pressure Monitoring System | ✓ | ✓ |
| Automatic Headlights | ✓ | ✓ |
| Headlight Delay-Off | ✓ | ✓ |
| LED Headlights | ✓ | ✓ |
| Adaptive Headlights | ✓ | — |
| Self-Leveling Headlights | ✓ | — |
| Daytime Running Lights | ✓ | ✓ |
| Integrated Turn Signal Mirrors | ✓ | — |
| Front Headrests | 2 | 2 |
| Front Fixed Headrests | ✓ | — |
| Rear Headrests | 2 | — |
| Rear Integrated Headrests | ✓ | — |
| Rear Center 3-Point Seatbelt | ✓ | — |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Lane Keeping Assist System | — | ✓ |
| Front Integrated Headrests | — | ✓ |
Engine
| Feature | BMW | Porsche |
|---|---|---|
| Base Engine Displacement | 4.4 L | 3.0 L |
| Number of Cylinders | V8 | flat 6 |
| Base Engine Type | gas | gas |
| Horsepower | 617 hp @ 6000 rpm | 388 hp @ 6500 rpm |
| Torque | 553 lb-ft @ 1800 rpm | 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 | ✓ | ✓ |
Drive Train
| Feature | BMW | 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 | BMW | Porsche |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 15/22 MPG | 18/25 MPG |
| EPA Fuel Economy (Combined) | 17 MPG | 21 MPG |
| EPA Driving Range (City/Highway) | 301.5/442.2 mi. | 298.8/415.0 mi. |
| Fuel Tank Capacity | 20.1 gal. | 16.6 gal. |
Comfort & Convenience
| Feature | BMW | Porsche |
|---|---|---|
| Push Button Start | ✓ | ✓ |
| Power Tilt and Telescopic Steering Wheel | ✓ | — |
| Transmission Controls on Steering Wheel | ✓ | ✓ |
| Cruise Control on Steering Wheel | ✓ | ✓ |
| Audio Controls on Steering Wheel | ✓ | ✓ |
| Electric Power Steering | ✓ | ✓ |
| Rear View Camera | ✓ | ✓ |
| 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/Cooling | ✓ | — |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | — |
| Tilt and Telescopic Steering Wheel | — | ✓ |
| Front Parking Sensors | — | ✓ |
| Rear Parking Sensors | — | ✓ |
| Dual Zone Climate Control | — | ✓ |
| Extended Cabin Heating | — | ✓ |
In Car Entertainment
| Feature | BMW | Porsche |
|---|---|---|
| Infotainment Display | 12.3 in | — |
| AM/FM Stereo | ✓ | ✓ |
| Premium Speaker Brand | Harman/Kardon | — |
| Stereo Power | 464W | 150W |
| Speaker System | 16 | 8 |
| Surround Audio | Discrete | — |
| Android Auto (Wired) | ✓ | — |
| Apple CarPlay (Wired) | ✓ | — |
| USB Port | ✓ | ✓ |
| Auxiliary Audio Input | ✓ | — |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 12 months | 3 months |
| Android Auto (Wireless) | — | ✓ |
| Apple CarPlay (Wireless) | — | ✓ |
Power Feature
| Feature | BMW | Porsche |
|---|---|---|
| One-Touch Power Windows | 4 | 2 |
| Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | BMW | Porsche |
|---|---|---|
| Front Head Room | 40.6 in. | — |
| Front Leg Room | 42.1 in. | — |
| Front Shoulder Room | 57.2 in. | — |
| Seat Material: Premium Leather | ✓ | — |
| Front Seat Type: Sport | ✓ | ✓ |
| Driver Seat Power Adjustments | 12-way | 6-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | — |
| Driver Seat Thigh Extension | ✓ | — |
| Driver Seat Memory Settings | 2 | — |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | — |
| Passenger Seat Thigh Extension | ✓ | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Driver Seat Ventilation | ✓ | — |
| Passenger Seat Ventilation | ✓ | — |
| Seat Material: Leatherette | — | ✓ |
| Driver Seat Manual Adjustments | — | 2-way |
| Passenger Seat Power Adjustments | — | 6-way |
| Passenger Seat Manual Adjustments | — | 2-way |
Rearseats
| Feature | BMW | Porsche |
|---|---|---|
| Rear Head Room | 37.1 in. | — |
| Rear Leg Room | 36.6 in. | — |
| Rear Shoulder Room | 54.6 in. | — |
| Split-Folding Rear Seatback | ✓ | — |
| Folding Rear Seat Feature | ✓ | — |
| Pass-Thru Center Armrest | ✓ | — |
Tires and Wheels
| Feature | BMW | Porsche |
|---|---|---|
| Wheel Finish | Painted Alloy | Painted Alloy |
| Wheel Size | 20 x 10.5 in. | 20 x 11.5 in. |
| Tire Type | Performance | Performance |
| Tire Size | 285/35R Y | 295/35R20 |
Suspension
| Feature | BMW | Porsche |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | BMW | 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. |
| Complimentary Scheduled Maintenance | 3 yr./ 36000 mi. | — |
Frequently Asked Questions
Common questions about comparing the 2025 BMW M8 Gran Coupe and 2025 Porsche 911.
What is the primary difference in powertrain performance between the two vehicles?
The 2025 BMW M8 Gran Coupe delivers significantly more power with 617 hp and 553 lb-ft of torque, whereas the 2025 Porsche 911 produces 388 hp and 332 lb-ft of torque. This results in a 229 hp advantage for the M8.
How do the fuel economy ratings compare for daily driving?
The Porsche 911 is notably more efficient, achieving 21 combined MPG (18 City/25 Highway). The BMW M8 achieves only 17 combined MPG (15 City/22 Highway), reflecting its higher performance tuning.
Which vehicle offers better utility for carrying passengers and luggage?
The BMW M8, classified as a sedan, offers 15.5 cu ft of cargo capacity, making it far superior for utility compared to the 911 coupe, which provides only 4.8 cu ft.
What is the exact price difference between the 2025 M8 Gran Coupe and the 911?
The 2025 BMW M8 Gran Coupe has an MSRP of $140,000, while the 2025 Porsche 911 starts at $120,100. This results in a $19,900 price premium for the M8.
Do both vehicles utilize the same drivetrain configuration?
No, the BMW M8 uses an all-wheel-drive system paired with an 8-speed shiftable automatic transmission. In contrast, the Porsche 911 is rear-wheel drive and employs an 8-speed automated manual transmission.
Which car has the larger physical dimensions?
The BMW M8 Gran Coupe is substantially larger, measuring 200.9 inches in length and 76.5 inches in width. The Porsche 911 is more compact at 178.8 inches long and 72.9 inches wide.
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