BMW 840i vs Mercedes-Benz SL43 AMG
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2027 Mercedes-Benz SL43 AMG
Overview
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| Selected trim | 840i | AMG SL 43 |
| Body style | Sedan | Convertible |
| Drivetrain | rear wheel drive | rear wheel drive |
| Fuel type | premium unleaded (recommended) | premium unleaded (required) |
| Transmission | 8-speed shiftable automatic | 9-speed shiftable automatic |
| Engine type | gas | mild hybrid |
| Model year | 2026 | 2027 |
Pricing & market
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| MSRP | $94,500 (best) | $114,900 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| Combined MPG | 24 MPG (best) | 22 MPG |
| City MPG | 21 MPG (best) | 19 MPG |
| Highway MPG | 29 MPG (best) | 27 MPG |
| Fuel tank | 18 gal | 18.5 gal (best) |
Performance
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| Horsepower | 335 hp | 416 hp (best) |
| Torque | 369 lb-ft | 369 lb-ft |
| Engine size | 3 L (best) | 2 L |
| Cylinders | I6 | I4 |
Size & capability
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| Seating | 5 seats (best) | 4 seats |
| Doors | 4 (best) | 2 |
| Cargo volume | 15.5 cu ft (best) | 7.5 cu ft |
| Payload | 1,003 lbs (best) | — |
| Curb weight | 4,180 lbs | 4,012 lbs (best) |
| Ground clearance | 4.8 in (best) | — |
| Wheelbase | 119 in (best) | 106.3 in |
| Length | 200.3 in (best) | 185.2 in |
| Width | 76.1 in (best) | 75.4 in |
| Height | 55.4 in (best) | 53.5 in |
Safety & recalls
| Spec | BMW 840i840i | Mercedes-Benz SL43 AMGAMG SL 43 |
|---|---|---|
| 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 | Mercedes-Benz SL43 AMG |
|---|---|---|
| 1 | 840i $94,500 MSRP(Currently comparing) | AMG SL 43 $114,900 MSRP(Currently comparing) |
| 2 | 840i $94,500 MSRP | — |
| 3 | 840i $104,500 MSRP | — |
BMW 840i vs Mercedes-Benz SL43 AMG FAQ
- Which is better: 2026 BMW 840i or 2027 Mercedes-Benz SL43 AMG?
- It depends on priorities. OpenDealer compares 2026 BMW 840i vs 2027 Mercedes-Benz SL43 AMG 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 or 2027 Mercedes-Benz SL43 AMG?
- Based on starting MSRP, the 2026 BMW 840i starts lower at $94,500.
- Which has better startingMsrp: 2026 BMW 840i or 2027 Mercedes-Benz SL43 AMG?
- The 2026 BMW 840i leads on startingMsrp in this comparison (94,500).
- Which has better combinedMpg: 2026 BMW 840i or 2027 Mercedes-Benz SL43 AMG?
- The 2026 BMW 840i leads on combinedMpg in this comparison (24).
- Which has better horsepower: 2026 BMW 840i or 2027 Mercedes-Benz SL43 AMG?
- The 2027 Mercedes-Benz SL43 AMG leads on horsepower in this comparison (416).
- Which has better seats: 2026 BMW 840i or 2027 Mercedes-Benz SL43 AMG?
- The 2026 BMW 840i leads on seats in this comparison (5).