BMW M850i xDrive vs Porsche 718 Cayman
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2025 Porsche 718 Cayman
Overview
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Selected trim | M850i xDrive | 718 Cayman Coupe |
| Body style | Sedan | Coupe |
| 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 Cayman718 Cayman Coupe |
|---|---|---|
| MSRP | $110,500 | $72,800 (best) |
| Lowest listing price | — | $54,739 (best) |
| Median listing price | — | $114,999 (best) |
| Highest listing price | — | $189,900 (best) |
| For sale now | 0 | 3 (best) |
Fuel economy & range
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Combined MPG | 19 MPG | 24 MPG (best) |
| City MPG | 17 MPG | 21 MPG (best) |
| Highway MPG | 24 MPG | 27 MPG (best) |
| Fuel tank | 18 gal (best) | 14.2 gal |
Performance
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Horsepower | 523 hp (best) | 300 hp |
| Torque | 553 lb-ft (best) | 280 lb-ft |
| Engine size | 4.4 L (best) | 2 L |
| Cylinders | V8 | flat 4 |
Size & capability
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Seating | 5 seats (best) | 2 seats |
| Doors | 4 (best) | 2 |
| Cargo volume | 15.5 cu ft (best) | 15 cu ft |
| Payload | 1,012 lbs (best) | 611 lbs |
| Curb weight | 4,696 lbs | 3,104 lbs (best) |
| Ground clearance | 5 in (best) | — |
| Wheelbase | 119 in (best) | 97.4 in |
| Length | 200.3 in (best) | 172.4 in |
| Width | 76.1 in (best) | 70.9 in |
| Height | 55.4 in (best) | 51 in |
Safety & recalls
| Spec | BMW M850i xDriveM850i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| 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 Cayman |
|---|---|---|
| 1 | M850i xDrive $110,500 MSRP(Currently comparing) | 718 Cayman Coupe $72,800 MSRP(Currently comparing) |
| 2 | M850i xDrive $110,500 MSRP | Style Edition $79,200 MSRP |
| 3 | M850i xDrive $120,300 MSRP | S $84,800 MSRP |
| 4 | — | GTS 4.0 $99,700 MSRP |
| 5 | — | GT4 RS $164,200 MSRP |
Live inventory
Porsche 718 Cayman3 for sale
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Used2025 Porsche 718 Cayman
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BMW M850i xDrive vs Porsche 718 Cayman FAQ
- Which is better: 2026 BMW M850i xDrive or 2025 Porsche 718 Cayman?
- It depends on priorities. OpenDealer compares 2026 BMW M850i xDrive vs 2025 Porsche 718 Cayman 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 Cayman?
- Based on starting MSRP, the 2025 Porsche 718 Cayman starts lower at $72,800. Live Porsche 718 Cayman listings start at $54,739.
- Which has better startingMsrp: 2026 BMW M850i xDrive or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on startingMsrp in this comparison (72,800).
- Which has better combinedMpg: 2026 BMW M850i xDrive or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on combinedMpg in this comparison (24).
- Which has better horsepower: 2026 BMW M850i xDrive or 2025 Porsche 718 Cayman?
- The 2026 BMW M850i xDrive leads on horsepower in this comparison (523).
- Which has better seats: 2026 BMW M850i xDrive or 2025 Porsche 718 Cayman?
- The 2026 BMW M850i xDrive leads on seats in this comparison (5).