Over 0–100 km/h, M850i xDrive G15 wins (3,83 s vs 5,12 s).
Performance comparison
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
Simulation
Calibration
Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.
| M850i xDrive G15 | 840i G15 | |
|---|---|---|
| 0–100 km/h | 3,83 s−1,29 s | 5,12 s |
| 400 m standing start | 11,71 s−1,63 s | 13,34 s |
| 1,000 m standing start | 21,08 s−2,96 s | 24,04 s |
| Top speed (electronically limited) | 250 km/h | 250 km/h |
| Power-to-weight ratio | 3,64 kg/hpbetter ratio | 5,20 kg/hp |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
Simulated performance at each stage. Winner in green.
| Palier | M850i xDrive G15 | 840i G15 |
|---|---|---|
| 0–30 km/h | 1,10 s | 1,42 s |
| 0–50 km/h | 1,83 s | 2,34 s |
| 0–80 km/h | 2,89 s | 3,81 s |
| 0–100 km/h | 3,83 s | 5,12 s |
| 0–120 km/h | 4,88 s | 6,75 s |
| 0–160 km/h | 7,71 s | 11,20 s |
| 0–200 km/h | 11,70 s | 18,00 s |
| 400 m standing start | 11,71 s | 13,34 s |
| 1,000 m standing start | 21,08 s | 24,04 s |
| Top speed limited | 250 km/h | 250 km/h |
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| Characteristic | Value | Detail |
|---|---|---|
| Power | 530 hp | 8 cyl |
| Torque | 750 Nm | |
| Weight | 1 930 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 333 hp | 6 cyl |
| Torque | 500 Nm | |
| Weight | 1 730 kg | manufacturer kerb weight |
| Drivetrain | Propulsion | |
| Gearbox | 8-speed Steptronic |
Off the line, the M850i xDrive hits 100 km/h in 3.83 s versus 5.12 s for the 840i. At this point, the M850i xDrive leads by 1.29 s and sits roughly 12 m ahead.
At 200 metres, the M850i xDrive is doing 160 km/h against 140 km/h for the 840i. The gap is 1.06 s. The challenger starts to claw back ground.
At 400 metres standing start, the M850i xDrive crosses the line in 11.71 s versus 13.33 s. The 1.63 s gap represents roughly 77 m of track - a gap visible to the naked eye.
Past 400 metres, the M850i xDrive continues to build its lead. At 600 metres, it runs at 224 km/h versus 196 km/h. At 1,000 metres, the M850i xDrive finishes in 21.07 s versus 24.04 s, with a 2.96 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 250 (i.e. 155 mph - industry threshold) km/h), preventing any comeback.
The M850i xDrive features all-wheel drive (AWD) against the 840i’s RWD. 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 share the same electronic speed cap: the M850i xDrive and the 840i are governed to 250 (i.e. 155 mph - industry threshold) km/h. At that speed, standard-fit tyres approach their safety threshold - an industrial ceiling common to most electric vehicles in this segment. Neither car shows its true aerodynamic potential in this duel.
With two combustion powertrains, the difference comes down to power-to-weight ratio (3.64 kg/hp vs 5.20 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.71 seconds. The 1.29 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, M850i xDrive G15 wins (3,83 s vs 5,12 s).
M850i xDrive G15 goes from 0 to 100 km/h in 3,83 seconds (calibrated simulation).
M850i xDrive G15: 530 hp, ratio 3,64 kg/hp. 840i G15: 333 hp, ratio 5,20 kg/hp.
M850i xDrive G15: 250 km/h. 840i G15: 250 km/h.