Over 0–100 km/h, Roma wins (3,43 s vs 4,72 s).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | Roma | 840d xDrive G15 | Gap |
|---|---|---|---|
| 0–100 km/h | 3.43 s | 4.72 s | 1.29 s · Roma |
| 400 m standing start | 10.68 s | 13.00 s | 2.32 s · Roma |
| 1,000 m standing start | 18.88 s | 23.70 s | 4.82 s · Roma |
| Top speed (electronically limited) | 357 km/h | 250 km/h | 107 km/h · Roma |
| Power-to-weight ratio | 2.37 kg/hp | 5.63 kg/hp | better ratio · Roma |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | Roma | 840d xDrive G15 |
|---|---|---|
| 0–30 km/h | 1.03 s · tight gap | 1.18 s |
| 0–50 km/h | 1.71 s | 1.94 s |
| 0–80 km/h | 2.75 s | 3.40 s |
| 0–100 km/h | 3.43 s | 4.72 s |
| 0–120 km/h | 4.14 s | 6.36 s |
| 0–160 km/h | 5.92 s | 10.86 s |
| 0–200 km/h | 8.39 s | 17.63 s |
| 400 m standing start | 10.68 s | 13.00 s |
| 1,000 m standing start | 18.88 s | 23.70 s |
| Top speed limited | 357 km/h | 250 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 | 620 hp | Pending |
| Torque | 760 Nm | |
| Weight | 1 472 kg | manufacturer kerb weight |
| Drivetrain | - | |
| Gearbox | 8-speed dual-clutch |
| 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 |
Off the line, the Roma hits 100 km/h in 3.43 s versus 4.72 s for the 840d xDrive. At this point, the Roma leads by 1.29 s and sits roughly 7 m ahead.
At 200 metres, the Roma is doing 182 km/h against 141 km/h for the 840d xDrive. The gap is 1.27 s. The gap remains stable from the start.
At 400 metres standing start, the Roma crosses the line in 10.68 s versus 13.00 s. The 2.32 s gap represents roughly 108 m of track - a gap visible to the naked eye.
Past 400 metres, the Roma continues to build its lead. At 600 metres, it runs at 256 km/h versus 196 km/h. At 1,000 metres, the Roma finishes in 18.88 s versus 23.69 s, with a 4.81 s lead.
Electronically capped at 250 (i.e. 155 mph - industry threshold) km/h, the 840d xDrive never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor - it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.
With two combustion powertrains, the difference comes down to power-to-weight ratio (2.37 kg/hp vs 5.63 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.33 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, Roma wins (3,43 s vs 4,72 s).
Roma goes from 0 to 100 km/h in 3,43 seconds (calibrated simulation).
Roma: 620 hp, ratio 2,37 kg/hp. 840d xDrive G15: 340 hp, ratio 5,63 kg/hp.
Roma: 357 km/h. 840d xDrive G15: 250 km/h.