BMW 840i xDrive vs Porsche 718 Boxster
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2025 Porsche 718 Boxster
Overview
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Boxster718 Boxster Convertible |
|---|---|---|
| Selected trim | 840i xDrive | 718 Boxster Convertible |
| Body style | Sedan | Convertible |
| 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 Boxster718 Boxster Convertible |
|---|---|---|
| MSRP | $97,500 | $74,900 (best) |
| Lowest listing price | — | $48,990 (best) |
| Median listing price | — | $54,779 (best) |
| Highest listing price | — | $74,999 (best) |
| For sale now | 0 | 3 (best) |
Fuel economy & range
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Boxster718 Boxster Convertible |
|---|---|---|
| Combined MPG | 24 MPG | 24 MPG |
| City MPG | 21 MPG | 21 MPG |
| Highway MPG | 29 MPG (best) | 27 MPG |
| Fuel tank | 18 gal (best) | 14.3 gal |
Performance
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Boxster718 Boxster Convertible |
|---|---|---|
| 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 Boxster718 Boxster Convertible |
|---|---|---|
| Seating | 5 seats (best) | 2 seats |
| Doors | 4 (best) | 2 |
| Cargo volume | 15.5 cu ft (best) | 9.7 cu ft |
| Payload | 1,010 lbs (best) | 617 lbs |
| Curb weight | 4,281 lbs | 3,097 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) | 50.4 in |
Safety & recalls
| Spec | BMW 840i xDrive840i xDrive | Porsche 718 Boxster718 Boxster Convertible |
|---|---|---|
| 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 Boxster |
|---|---|---|
| 1 | 840i xDrive $97,500 MSRP(Currently comparing) | 718 Boxster Convertible $74,900 MSRP(Currently comparing) |
| 2 | 840i xDrive $97,500 MSRP | Style Edition $81,300 MSRP |
| 3 | 840i xDrive $107,500 MSRP | S $86,900 MSRP |
| 4 | — | GTS 4.0 $101,800 MSRP |
Live inventory
Porsche 718 Boxster3 for sale
See all
Used2017 Porsche 718 Boxster
Roadster
Jet Black Metallic•Black/Bordeaux Red32,294 mi$48,990Maserati of Atlanta
Roswell, GA
Used2024 Porsche 718 Boxster
Base
Green24,383 mi$74,999Land Rover Tulsa
Tulsa, OK
Certified2017 Porsche 718 Boxster
Base
Guards Red•Black23,198 mi$54,779Porsche Tallahassee
Tallahassee, FL
BMW 840i xDrive vs Porsche 718 Boxster FAQ
- Which is better: 2026 BMW 840i xDrive or 2025 Porsche 718 Boxster?
- It depends on priorities. OpenDealer compares 2026 BMW 840i xDrive vs 2025 Porsche 718 Boxster 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 Boxster?
- Based on starting MSRP, the 2025 Porsche 718 Boxster starts lower at $74,900. Live Porsche 718 Boxster listings start at $48,990.
- Which has better startingMsrp: 2026 BMW 840i xDrive or 2025 Porsche 718 Boxster?
- The 2025 Porsche 718 Boxster leads on startingMsrp in this comparison (74,900).
- Which has better horsepower: 2026 BMW 840i xDrive or 2025 Porsche 718 Boxster?
- The 2025 Porsche 718 Boxster leads on horsepower in this comparison (394).
- Which has better seats: 2026 BMW 840i xDrive or 2025 Porsche 718 Boxster?
- The 2026 BMW 840i xDrive leads on seats in this comparison (5).