2026Canadian prices and NRCan ratings
BMW M850i xDrive vs Mercedes-Benz AMG SL 63 4MATIC+
Key differences
From published figures, not a road test- The M850i xDrive uses 2.5 L/100 km less combined (12.2 vs 14.7), about 500 L less fuel over 20,000 km.
- Higher Vehonix efficiency score for the M850i xDrive: 2.9/10 vs 1.3/10.
Side by side
Add a third model →| Spec | Mercedes-BenzMercedes-Benz AMG SL 63 4MATIC+ | |
|---|---|---|
| MSRP from | — | — |
| Vehonix efficiency score (out of 10) | 2.9/10 | 1.3/10 |
| Body | Convertible | Convertible |
| Fuel | Gasoline | Gasoline |
| Combined (L or Le/100 km) | 12.2 | 14.7 |
| City | 14.1 | 17.3 |
| Highway | 9.9 | 11.4 |
| Electric range | — | — |
| Level 2 charge (240 V) | — | — |
| Total range (PHEV) | — | — |
| CO2 (g/km) | 284 | 347 |
| CO2 rating (out of 10) | — | — |
| Smog rating (out of 10) | — | — |
| Max power | — | — |
| Seats | — | — |
| Drivetrain | — | — |
| AWD / 4WD offered (winter) | No | No |
| Fuel required | — | — |
| Manual offered | No | No |
| Rated configurations | 2 | 1 |
| 2026 safety recalls (Transport Canada) | 0 | 0 |
The best figure on each row is highlighted. MSRP is the cheapest checked trim; fuel use is the most efficient trim.