Over 0–100 km/h, M550d xDrive G30 wins (4,46 s vs 7,37 s).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | M550d xDrive G30 | 120d F40 | Gap |
|---|---|---|---|
| 0–100 km/h | 4.46 s | 7.37 s | 2.91 s · M550d xDrive G30 |
| 400 m standing start | 12.66 s | 15.46 s | 2.80 s · M550d xDrive G30 |
| 1,000 m standing start | 22.92 s | 28.03 s | 5.11 s · M550d xDrive G30 |
| Top speed (electronically limited) | 250 km/h | 230 km/h | 20 km/h · M550d xDrive G30 |
| Power-to-weight ratio | 4.61 kg/hp | 7.63 kg/hp | better ratio · M550d xDrive G30 |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | M550d xDrive G30 | 120d F40 |
|---|---|---|
| 0–30 km/h | 1.24 s | 1.93 s |
| 0–50 km/h | 2.01 s | 3.05 s |
| 0–80 km/h | 3.29 s | 5.30 s |
| 0–100 km/h | 4.46 s | 7.37 s |
| 0–120 km/h | 5.90 s | 10.04 s |
| 0–160 km/h | 9.81 s | 17.96 s |
| 0–200 km/h | 15.59 s | 33.74 s |
| 400 m standing start | 12.66 s | 15.46 s |
| 1,000 m standing start | 22.92 s | 28.03 s |
| Top speed limited | 250 km/h | 230 km/h |
Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| Characteristic | Value | Detail |
|---|---|---|
| Power | 400 hp | 6 cyl |
| Torque | 760 Nm | |
| Weight | 1 845 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 190 hp | 4 cyl |
| Torque | 400 Nm | |
| Weight | 1 450 kg | manufacturer kerb weight |
| Drivetrain | Traction | |
| Gearbox | 8-speed Steptronic transmission |
Off the line, the M550d xDrive hits 100 km/h in 4.46 s versus 7.37 s for the 120d. At this point, the M550d xDrive leads by 2.91 s and sits roughly 22 m ahead.
At 200 metres, the M550d xDrive is doing 146 km/h against 121 km/h for the 120d. The gap is 1.86 s. The challenger starts to claw back ground.
At 400 metres standing start, the M550d xDrive crosses the line in 12.66 s versus 15.45 s. The 2.79 s gap represents roughly 111 m of track - a gap visible to the naked eye.
Past 400 metres, the M550d xDrive continues to build its lead. At 600 metres, it runs at 204 km/h versus 167 km/h. At 1,000 metres, the M550d xDrive finishes in 22.91 s versus 28.02 s, with a 5.11 s lead.
The M550d xDrive features all-wheel drive (AWD) against the 120d’s FWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.
Both rivals are electronically governed, but not at the same level: the M550d xDrive is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 120d at 231 km/h. This isn’t a physical engine limit - it’s a manufacturer choice, usually for tyre safety or homologation reasons. Neither car reaches its true aerodynamic top speed.
With two combustion powertrains, the difference comes down to power-to-weight ratio (4.61 kg/hp vs 7.63 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.63 seconds. The 2.91 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, M550d xDrive G30 wins (4,46 s vs 7,37 s).
M550d xDrive G30 goes from 0 to 100 km/h in 4,46 seconds (calibrated simulation).
M550d xDrive G30: 400 hp, ratio 4,61 kg/hp. 120d F40: 190 hp, ratio 7,63 kg/hp.
M550d xDrive G30: 250 km/h. 120d F40: 230 km/h.