BMW 840i 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 840i xDrive840i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Selected trim | 840i xDrive | 718 Cayman Coupe |
| Body style | Sedan | Coupe |
| Drivetrain | all wheel drive | rear wheel drive |
| Fuel type | premium unleaded (recommended) | premium unleaded (required) |
| Transmission | 8-speed shiftable automatic | 7-speed automated manual |
| Engine type | gas | gas |
| Model year | 2026 | 2025 |
Pricing & market
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| MSRP | $97,500 | $72,800 (best) |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Combined MPG | 24 MPG | 24 MPG |
| City MPG | 21 MPG | 21 MPG |
| Highway MPG | 29 MPG (best) | 27 MPG |
| Fuel tank | 18 gal (best) | 14.2 gal |
Performance
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Horsepower | 335 hp (best) | 300 hp |
| Torque | 369 lb-ft (best) | 280 lb-ft |
| Engine size | 3 L (best) | 2 L |
| Cylinders | I6 | flat 4 |
Size & capability
| Spec | BMW 840i xDrive840i 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 | 1,010 lbs (best) | 611 lbs |
| Curb weight | 4,281 lbs | 3,104 lbs (best) |
| Ground clearance | 4.8 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 840i xDrive840i xDrive | Porsche 718 Cayman718 Cayman Coupe |
|---|---|---|
| Open recalls (YMM scope) | 1 | None reported (best) |
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 840i xDrive | Porsche 718 Cayman |
|---|---|---|
| 1 | 840i xDrive $97,500 MSRP(Currently comparing) | 718 Cayman Coupe $72,800 MSRP(Currently comparing) |
| 2 | 840i xDrive $97,500 MSRP | Style Edition $79,200 MSRP |
| 3 | 840i xDrive $107,500 MSRP | S $84,800 MSRP |
| 4 | — | GTS 4.0 $99,700 MSRP |
| 5 | — | GT4 RS $164,200 MSRP |
BMW 840i xDrive vs Porsche 718 Cayman FAQ
- Which is better: 2026 BMW 840i xDrive or 2025 Porsche 718 Cayman?
- It depends on priorities. OpenDealer compares 2026 BMW 840i 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 840i xDrive or 2025 Porsche 718 Cayman?
- Based on starting MSRP, the 2025 Porsche 718 Cayman starts lower at $72,800.
- Which has better startingMsrp: 2026 BMW 840i xDrive or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on startingMsrp in this comparison (72,800).
- Which has better horsepower: 2026 BMW 840i xDrive or 2025 Porsche 718 Cayman?
- The 2025 Porsche 718 Cayman leads on horsepower in this comparison (493).
- Which has better seats: 2026 BMW 840i xDrive or 2025 Porsche 718 Cayman?
- The 2026 BMW 840i xDrive leads on seats in this comparison (5).