Over 0–100 km/h, 840i xDrive G15 wins (4,81 s vs 5,60 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.
| 840i xDrive G15 | Boxster 981 | |
|---|---|---|
| 0–100 km/h | 4,81 s−0,79 s | 5,60 s |
| 400 m standing start | 13,05 s−0,81 s | 13,86 s |
| 1,000 m standing start | 23,65 s−1,56 s | 25,21 s |
| Top speed (electronically limited) | 250 km/h | 252 km/h−2 km/h |
| Power-to-weight ratio | 5,39 kg/hp | 5,15 kg/hpbetter ratio |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
Simulated performance at each stage. Winner in green.
| Palier | 840i xDrive G15 | Boxster 981 |
|---|---|---|
| 0–30 km/h | 1,29 s | 1,42 stight gap |
| 0–50 km/h | 2,13 s | 2,35 s |
| 0–80 km/h | 3,54 s | 4,14 s |
| 0–100 km/h | 4,81 s | 5,60 s |
| 0–120 km/h | 6,40 s | 7,55 s |
| 0–160 km/h | 10,71 s | 12,82 s |
| 0–200 km/h | 17,25 s | 21,85 s |
| 400 m standing start | 13,05 s | 13,86 s |
| 1,000 m standing start | 23,65 s | 25,21 s |
| Top speed limited | 250 km/h | 252 km/h |
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| Characteristic | Value | Detail |
|---|---|---|
| Power | 333 hp | 6 cyl |
| Torque | 500 Nm | |
| Weight | 1 795 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 259 hp | Engine block and cylinder heads formed in aluminum |
| Torque | 290 Nm | |
| Weight | 1 335 kg | manufacturer kerb weight |
| Drivetrain | Propulsion | |
| Gearbox | 6 speed standard |
Off the line, the Bmw 840i xDrive hits 100 km/h in 4.81 s versus 5.60 s for the Boxster. At this point, the Bmw 840i xDrive leads by 0.79 s and sits roughly 8 m ahead.
At 200 metres, the Bmw 840i xDrive is doing 142 km/h against 134 km/h for the Boxster. The gap is 0.53 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 840i xDrive crosses the line in 13.05 s versus 13.86 s. The 0.81 s gap represents roughly 37 m of track - a gap visible to the naked eye.
Past 400 metres, the Bmw 840i xDrive continues to build its lead. At 600 metres, it runs at 198 km/h versus 185 km/h. At 1,000 metres, the Bmw 840i xDrive finishes in 23.65 s versus 25.21 s, with a 1.56 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 252 km/h), preventing any comeback.
The Bmw 840i xDrive features all-wheel drive (AWD) against the Boxster’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 are electronically governed, but not at the same level: the Bmw 840i xDrive is capped at 250 (i.e. 155 mph - industry threshold) km/h, the Boxster at 262 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 (5.39 kg/hp vs 5.15 kg/hp) and transmission (Automatic vs Unknown).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.61 seconds. The 0.79 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Swap one of the two models to explore an equivalent duel in the same segment.
Over 0–100 km/h, 840i xDrive G15 wins (4,81 s vs 5,60 s).
840i xDrive G15 goes from 0 to 100 km/h in 4,81 seconds (calibrated simulation).
840i xDrive G15: 333 hp, ratio 5,39 kg/hp. Boxster 981: 259 hp, ratio 5,15 kg/hp.
840i xDrive G15: 250 km/h. Boxster 981: 252 km/h.