Mercedes-Benz SL450 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 | Mercedes-Benz SL450SL 450 | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Selected trim | SL 450 | Spyder RS |
| Body style | Convertible | Convertible |
| Drivetrain | rear wheel drive | rear wheel drive |
| Fuel type | premium unleaded (required) | premium unleaded (required) |
| Transmission | 9-speed shiftable automatic | 7-speed automated manual |
| Engine type | gas | gas |
| Model year | 2020 | 2025 |
Pricing & market
| Spec | Mercedes-Benz SL450SL 450 | Porsche 718 SpyderSpyder RS |
|---|---|---|
| MSRP | $91,000 (best) | $164,200 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | Mercedes-Benz SL450SL 450 | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Combined MPG | 22 MPG (best) | 16 MPG |
| City MPG | 20 MPG (best) | 14 MPG |
| Highway MPG | 28 MPG (best) | 19 MPG |
| Fuel tank | 19.8 gal (best) | 16.9 gal |
Performance
| Spec | Mercedes-Benz SL450SL 450 | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Horsepower | 362 hp | 493 hp (best) |
| Torque | 369 lb-ft (best) | 331 lb-ft |
| Engine size | 3 L | 4 L (best) |
| Cylinders | V6 | flat 6 |
Size & capability
| Spec | Mercedes-Benz SL450SL 450 | Porsche 718 SpyderSpyder RS |
|---|---|---|
| Seating | 2 seats | 2 seats |
| Doors | 2 | 2 |
| Cargo volume | 13.5 cu ft (best) | 8.6 cu ft |
| Payload | — | 655 lbs (best) |
| Curb weight | 3,825 lbs | 3,214 lbs (best) |
| Ground clearance | 3.7 in (best) | — |
| Wheelbase | 101.8 in (best) | 97.7 in |
| Length | 182.3 in (best) | 173.9 in |
| Width | 73.9 in (best) | 71.7 in |
| Height | 51.2 in (best) | 49.3 in |
Safety & recalls
| Spec | Mercedes-Benz SL450SL 450 | 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 | Mercedes-Benz SL450 | Porsche 718 Spyder |
|---|---|---|
| 1 | SL 450 $91,000 MSRP(Currently comparing) | Spyder RS $164,200 MSRP(Currently comparing) |
Mercedes-Benz SL450 vs Porsche 718 Spyder FAQ
- Which is better: 2020 Mercedes-Benz SL450 or 2025 Porsche 718 Spyder?
- It depends on priorities. OpenDealer compares 2020 Mercedes-Benz SL450 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: 2020 Mercedes-Benz SL450 or 2025 Porsche 718 Spyder?
- Based on starting MSRP, the 2020 Mercedes-Benz SL450 starts lower at $91,000.
- Which has better startingMsrp: 2020 Mercedes-Benz SL450 or 2025 Porsche 718 Spyder?
- The 2020 Mercedes-Benz SL450 leads on startingMsrp in this comparison (91,000).
- Which has better combinedMpg: 2020 Mercedes-Benz SL450 or 2025 Porsche 718 Spyder?
- The 2020 Mercedes-Benz SL450 leads on combinedMpg in this comparison (22).
- Which has better horsepower: 2020 Mercedes-Benz SL450 or 2025 Porsche 718 Spyder?
- The 2025 Porsche 718 Spyder leads on horsepower in this comparison (493).