BMW 640i xDrive vs Mercedes-Benz SL550
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2020 Mercedes-Benz SL550
Overview
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| Selected trim | 640i xDrive | SL 550 |
| Body style | Convertible | Convertible |
| Drivetrain | all wheel drive | rear wheel drive |
| Fuel type | premium unleaded (required) | premium unleaded (required) |
| Transmission | 8-speed shiftable automatic | 9-speed shiftable automatic |
| Engine type | gas | gas |
| Model year | 2018 | 2020 |
Pricing & market
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| MSRP | $89,700 (best) | $114,700 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| Combined MPG | 22 MPG (best) | 20 MPG |
| City MPG | 19 MPG (best) | 17 MPG |
| Highway MPG | 28 MPG (best) | 25 MPG |
| Fuel tank | 18.5 gal | 19.8 gal (best) |
Performance
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| Horsepower | 315 hp | 449 hp (best) |
| Torque | 330 lb-ft | 516 lb-ft (best) |
| Engine size | 3 L | 4.7 L (best) |
| Cylinders | I6 | V8 |
Size & capability
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| Seating | 4 seats (best) | 2 seats |
| Doors | 2 | 2 |
| Cargo volume | 11 cu ft | 13.5 cu ft (best) |
| Curb weight | 4,415 lbs | 4,012 lbs (best) |
| Ground clearance | 4.8 in (best) | 3.7 in |
| Wheelbase | 112.4 in (best) | 101.8 in |
| Length | 192.8 in (best) | 182.3 in |
| Width | 74.6 in (best) | 73.9 in |
| Height | 53.7 in (best) | 51.2 in |
Safety & recalls
| Spec | BMW 640i xDrive640i xDrive | Mercedes-Benz SL550SL 550 |
|---|---|---|
| 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 640i xDrive | Mercedes-Benz SL550 |
|---|---|---|
| 1 | 640i xDrive $89,700 MSRP(Currently comparing) | SL 550 $114,700 MSRP(Currently comparing) |