BMW M850i xDrive vs Porsche 718 Spyder
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2025 Porsche 718 Spyder
Overview
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Selected trim | M850i xDrive | Spyder RS |
| Body style | Sedan | Convertible |
| Drivetrain | all wheel drive | rear wheel drive |
| Fuel type | premium unleaded (required) | premium unleaded (required) |
| Transmission | 8-speed shiftable automatic | 7-speed automated manual |
| Engine type | gas | gas |
| Model year | 2026 | 2025 |
Pricing & market
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| MSRP | $110,500 (best) | $164,200 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Combined MPG | 19 MPG (best) | 16 MPG |
| City MPG | 17 MPG (best) | 14 MPG |
| Highway MPG | 24 MPG (best) | 19 MPG |
| Fuel tank | 18 gal (best) | 16.9 gal |
Performance
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Horsepower | 523 hp (best) | 493 hp |
| Torque | 553 lb-ft (best) | 331 lb-ft |
| Engine size | 4.4 L (best) | 4 L |
| Cylinders | V8 | flat 6 |
Size & capability
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Seating | 5 seats (best) | 2 seats |
| Doors | 4 (best) | 2 |
| Cargo volume | 15.5 cu ft (best) | 8.6 cu ft |
| Payload | 1,012 lbs (best) | 655 lbs |
| Curb weight | 4,696 lbs | 3,214 lbs (best) |
| Ground clearance | 5 in (best) | — |
| Wheelbase | 119 in (best) | 97.7 in |
| Length | 200.3 in (best) | 173.9 in |
| Width | 76.1 in (best) | 71.7 in |
| Height | 55.4 in (best) | 49.3 in |
Safety & recalls
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Open recalls (YMM scope) | None reported | None reported |
Highlighted values indicate the better figure for that spec when a clear winner exists. Specs reflect the selected trim for each vehicle. Drag a vehicle header to reorder columns. MSRP and specifications are manufacturer data; listing prices and inventory come from live dealer listings. Safety ratings are from NHTSA.
Trim overview
All available trims with MSRP. The trim selected above is highlighted; comparison specs use that selection.
| Trim | BMW M850i xDrive | Porsche 718 Spyder |
|---|---|---|
| 1 | M850i xDrive $110,500 MSRP(Currently comparing) | Spyder RS $164,200 MSRP(Currently comparing) |
| 2 | M850i xDrive $110,500 MSRP | — |
| 3 | M850i xDrive $120,300 MSRP | — |
BMW M850i xDrive vs Porsche 718 Spyder FAQ
- Which is better: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- It depends on priorities. OpenDealer compares 2026 BMW M850i xDrive vs 2025 Porsche 718 Spyder on MSRP, fuel economy, horsepower, seating, towing, NHTSA safety ratings, and live market prices so you can weigh the tradeoffs.
- Which costs less: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- Based on starting MSRP, the 2026 BMW M850i xDrive starts lower at $110,500.
- Which has better startingMsrp: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- The 2026 BMW M850i xDrive leads on startingMsrp in this comparison (110,500).
- Which has better combinedMpg: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- The 2026 BMW M850i xDrive leads on combinedMpg in this comparison (19).
- Which has better horsepower: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- The 2026 BMW M850i xDrive leads on horsepower in this comparison (523).
- Which has better seats: 2026 BMW M850i xDrive or 2025 Porsche 718 Spyder?
- The 2026 BMW M850i xDrive leads on seats in this comparison (5).