2025 BMW M5 vs 2025 Porsche 911
Comparison Overview
Choosing between the 2025 BMW M5 and the 2025 Porsche 911 often boils down to whether you prioritize staggering plug-in hybrid muscle or traditional sports car precision. The M5 boasts a massive 717 hp and 738 lb-ft of torque, though this performance comes at the cost of fuel economy, netting only 14 MPG combined. Conversely, the 911, while significantly less powerful at 388 hp, offers much better efficiency with 21 MPG combined. A major differentiator is size: the M5 is a substantial sedan at 200.6 inches long, featuring a usable 16.5 cu ft of cargo space, whereas the 911 is a compact coupe only 178.8 inches long with a tiny 4.8 cu ft of storage. The M5 also offers a 27-mile electric range, a benefit the 911 entirely lacks. Deciding hinges on balancing the M5's brute force and practicality against the 911's superior efficiency and more focused driving dynamics.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 BMW M5
The 2025 BMW M5 wins for commuters due to its usable 27-mile electric range and four-door sedan body style, despite its lower 14 MPG combined rating.
2025 BMW M5
The BMW M5 is the clear family choice, offering a longer body at 200.6 inches and considerably more usable cargo capacity at 16.5 cu ft compared to the 911 coupe.
2025 BMW M5
Enthusiasts seeking maximum acceleration will prefer the M5's commanding 717 hp and 738 lb-ft of torque over the 911's output.
2025 Porsche 911
The Porsche 911 is the better value proposition, offering 7 MPG better fuel economy for a nearly identical starting price of $120,100.
Choose the BMW M5 if...
- You need the brute force of 717 horsepower and 738 lb-ft of torque for maximum straight-line speed.
- You require the convenience of an all-wheel-drive sedan with four doors and 16.5 cu ft of trunk space.
- You plan to use the 27 miles of electric range for daily driving before engaging the V8 engine.
Choose the Porsche 911 if...
- You prioritize efficiency, benefiting from the 911’s 21 MPG combined rating versus the M5’s 14 MPG.
- You prefer a smaller, nimbler vehicle that measures just 178.8 inches in length and is a dedicated two-door coupe.
- You value the classic, focused driving dynamics of a rear-wheel-drive sports car.
Key Dimensions
| Dimension | BMW M5 | Porsche 911 |
|---|---|---|
| Length | 200.6" | 178.8" |
| Width | 77.6" | 72.9" |
| Height | 59.4" | 51.2" |
| Wheelbase | 118.3" | 96.5" |
Features Comparison
Safety
| Feature | BMW | Porsche |
|---|---|---|
| Blind Spot Monitor | ✓ | — |
| Lane Departure Warning | ✓ | — |
| Lane Keeping Assist System | ✓ | ✓ |
| Rear Cross Traffic Alert | ✓ | — |
| 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 | ✓ | ✓ |
| Cornering Lights | ✓ | — |
| Integrated Turn Signal Mirrors | ✓ | — |
| Front Headrests | 2 | 2 |
| Front Fixed Headrests | ✓ | — |
| Rear Headrests | 3 | — |
| Rear Height Adjustable Headrests | ✓ | — |
| Rear Center 3-Point Seatbelt | ✓ | — |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Front Integrated Headrests | — | ✓ |
| Engine Immobilizer | — | ✓ |
Engine
| Feature | BMW | Porsche |
|---|---|---|
| Base Engine Displacement | 4.4 L | 3.0 L |
| Number of Cylinders | V8 | flat 6 |
| Base Engine Type | plug-in hybrid | gas |
| Horsepower | 717 hp @ 5600 rpm | 388 hp @ 6500 rpm |
| Torque | 738 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) | 12/17 MPG | 18/25 MPG |
| EPA Fuel Economy (Combined) | 14 MPG | 21 MPG |
| EPA Driving Range (City/Highway) | 190.8/270.3 mi. | 298.8/415.0 mi. |
| EPA Efficiency (City/Highway MPGe) | 45/57 MPGe | — |
| EPA Efficiency (Combined MPGe) | 50 MPGe | — |
| EPA Electric Driving Range | 27 mi. | — |
| EPA Energy Consumption (kWh/100 mi) | 59 | — |
| Charging Time (240V) | 4.0 hr. | — |
| Fuel Tank Capacity | 15.9 gal. | 16.6 gal. |
| DC Fast Charging Port Type | SAE J1772 | — |
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 | ✓ | ✓ |
| Front Parking Sensors | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Wireless Charging Pad | ✓ | ✓ |
| Cruise Control | ✓ | ✓ |
| Universal Remote Transmitter | ✓ | ✓ |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | — |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | — |
| Leather Steering Wheel | ✓ | ✓ |
| Heated Steering Wheel | ✓ | ✓ |
| Four Zone Climate Control | ✓ | — |
| Rear Ventilation Ducts | ✓ | — |
| Interior Air Filtration | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | — |
| Tilt and Telescopic Steering Wheel | — | ✓ |
| Dual Zone Climate Control | — | ✓ |
| Extended Cabin Heating | — | ✓ |
In Car Entertainment
| Feature | BMW | Porsche |
|---|---|---|
| Infotainment Display | 14.9 in | — |
| AM/FM Stereo | ✓ | ✓ |
| Premium Speaker Brand | Bowers & Wilkins | — |
| Stereo Power | 655W | 150W |
| Speaker System | 18 | 8 |
| Surround Audio | Discrete | — |
| Android Auto (Wired) | ✓ | — |
| Apple CarPlay (Wired) | ✓ | — |
| USB Port | ✓ | ✓ |
| 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 |
| Moonroof Type | 1st Row Fixed Glass Extended | — |
| Keyless Entry | ✓ | ✓ |
| Reverse Tilt Passenger Mirror | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | BMW | Porsche |
|---|---|---|
| Front Head Room | 39.0 in. | — |
| Front Leg Room | 41.3 in. | — |
| Front Shoulder Room | 59.2 in. | — |
| Seat Material: Premium Leather | ✓ | — |
| Front Seat Type: Sport | ✓ | ✓ |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | — |
| Driver Seat Memory Settings | 2 | — |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Seat Material: Leatherette | — | ✓ |
| Driver Seat Power Adjustments | — | 6-way |
| 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 | 37.5 in. | — |
| Rear Leg Room | 36.2 in. | — |
| Rear Shoulder Room | 56.9 in. | — |
| Split-Folding Rear Seatback | ✓ | — |
| Folding Center Armrest | ✓ | — |
Tires and Wheels
| Feature | BMW | Porsche |
|---|---|---|
| Wheel Finish | Painted Alloy | Painted Alloy |
| Wheel Size | 21 x 11.0 in. | 20 x 11.5 in. |
| Tire Type | Performance | Performance |
| Tire Size | 295/35R21 | 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. |
| EV Battery Warranty | 8 yr./ 100000 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 M5 and 2025 Porsche 911.
How does the power difference between these two affect real-world driving?
The 2025 BMW M5 offers a massive 329 hp advantage, translating to significantly quicker acceleration figures than the 2025 Porsche 911. While both are fast, the M5 delivers supercar levels of effortless power, whereas the 911 requires more mechanical engagement to access its performance envelope.
Is the BMW M5 practical enough for daily commuting?
Yes, the M5 is designed as a high-performance sedan, offering a more compliant ride, a traditional automatic transmission, and the critical 27 miles of electric range for silent, emission-free city trips. Its 16.5 cu ft cargo area also beats the 911 significantly.
Which car makes more sense if I prioritize saving money on fuel?
The Porsche 911 is the definitive choice for fuel savings, achieving 21 MPG combined versus the M5's 14 MPG combined rating. Furthermore, the M5 requires premium fuel and must recharge its battery for full efficiency benefits.
Why is the BMW M5 so much longer than the 911?
The M5 is a full-size sedan (200.6 inches long) designed to accommodate four to five passengers comfortably, whereas the 911 is a compact, dedicated sports coupe (178.8 inches long) built purely for driving dynamics and reduced weight.
Do both vehicles use premium fuel?
Yes, both the 2025 BMW M5 and the 2025 Porsche 911 mandate the use of premium unleaded fuel to achieve their stated performance figures.
How does the cargo capacity compare between the two?
The difference is stark: the M5 sedan offers 16.5 cubic feet of cargo capacity, while the 911 coupe only provides a meager 4.8 cubic feet, usually located in the front trunk or 'frunk'.
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