Over 0–100 km/h, 840d xDrive G15 wins (4,73 s vs 7,74 s).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | 840d xDrive G15 | 420i xDrive G22 | Gap |
|---|---|---|---|
| 0–100 km/h | 4.73 s | 7.74 s | 3.01 s · 840d xDrive G15 |
| 400 m standing start | 13.00 s | 15.61 s | 2.61 s · 840d xDrive G15 |
| 1,000 m standing start | 23.59 s | 28.72 s | 5.13 s · 840d xDrive G15 |
| Top speed (electronically limited) | 250 km/h | 234 km/h | 16 km/h · 840d xDrive G15 |
| Power-to-weight ratio | 5.63 kg/hp | 8.64 kg/hp | better ratio · 840d xDrive G15 |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | 840d xDrive G15 | 420i xDrive G22 |
|---|---|---|
| 0–30 km/h | 1.29 s · tight gap | 1.38 s |
| 0–50 km/h | 2.06 s | 2.58 s |
| 0–80 km/h | 3.45 s | 5.26 s |
| 0–100 km/h | 4.73 s | 7.74 s |
| 0–120 km/h | 6.33 s | 10.94 s |
| 0–160 km/h | 10.67 s | 20.29 s |
| 0–200 km/h | 17.19 s | 38.25 s |
| 400 m standing start | 13.00 s | 15.61 s |
| 1,000 m standing start | 23.59 s | 28.72 s |
| Top speed limited | 250 km/h | 234 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 | 340 hp | 6 cyl |
| Torque | 700 Nm | |
| Weight | 1 915 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 184 hp | Pending |
| Torque | 300 Nm | |
| Weight | 1 590 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | Eight-speed Steptronic transmission |
Off the line, the 840d xDrive hits 100 km/h in 4.73 s versus 7.74 s for the 420i xDrive. At this point, the 840d xDrive leads by 3.01 s and sits roughly 14 m ahead.
At 200 metres, the 840d xDrive is doing 142 km/h against 115 km/h for the 420i xDrive. The gap is 1.55 s. The challenger starts to claw back ground.
At 400 metres standing start, the 840d xDrive crosses the line in 13.00 s versus 15.61 s. The 2.61 s gap represents roughly 99 m of track - a gap visible to the naked eye.
Past 400 metres, the 840d xDrive continues to build its lead. At 600 metres, it runs at 198 km/h versus 160 km/h. At 1,000 metres, the 840d xDrive finishes in 23.58 s versus 28.71 s, with a 5.13 s lead.
Both rivals are electronically governed, but not at the same level: the 840d xDrive is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 420i xDrive at 238 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 (5.63 kg/hp vs 8.64 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.85 seconds. The 3.01 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, 840d xDrive G15 wins (4,73 s vs 7,74 s).
840d xDrive G15 goes from 0 to 100 km/h in 4,73 seconds (calibrated simulation).
840d xDrive G15: 340 hp, ratio 5,63 kg/hp. 420i xDrive G22: 184 hp, ratio 8,64 kg/hp.
840d xDrive G15: 250 km/h. 420i xDrive G22: 234 km/h.