Over 0–100 km/h, 840i Convertible G15 wins (5,57 s vs 6,31 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 Convertible G15 | P7i | |
|---|---|---|
| 0–100 km/h | 5,57 s−0,74 s | 6,31 s |
| 400 m standing start | 13,79 s−0,78 s | 14,57 s |
| 1,000 m standing start | 24,82 s−1,56 s | 26,38 s |
| Top speed (electronically limited) | 250 km/h+50 km/h | 200 km/h |
| Power-to-weight ratio | 5,53 kg/hpbetter ratio | 7,18 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 | 840i Convertible G15 | P7i |
|---|---|---|
| 0–30 km/h | 1,54 s | 1,66 stight gap |
| 0–50 km/h | 2,50 s | 2,77 s |
| 0–80 km/h | 4,11 s | 4,62 s |
| 0–100 km/h | 5,57 s | 6,31 s |
| 0–120 km/h | 7,39 s | 8,47 s |
| 0–160 km/h | 12,34 s | 14,90 s |
| 0–200 km/h | 19,98 s | 25,20 s |
| 400 m standing start | 13,79 s | 14,57 s |
| 1,000 m standing start | 24,82 s | 26,38 s |
| Top speed limited | 250 km/h | 200 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 | 1 840 kg | manufacturer kerb weight |
| Drivetrain | - | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 282 hp | Permanent Magnet Synchronous Motor |
| Torque | 430 Nm | |
| Weight | 2 025 kg | manufacturer kerb weight |
| Drivetrain | Propulsion | |
| Gearbox | Single-speed fixed gear |
Off the line, the Bmw 840i Convertible hits 100 km/h in 5.57 s versus 6.31 s for the P7i. Despite lacking instant torque, 333 hp of power compensates. At this point, the Bmw 840i Convertible leads by 0.74 s and sits roughly 7 m ahead.
At 200 metres, the Bmw 840i Convertible is doing 136 km/h against 129 km/h for the P7i. The gap is 0.47 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 840i Convertible crosses the line in 13.79 s versus 14.56 s. The 0.77 s gap represents roughly 34 m of track - a gap visible to the naked eye.
Past 400 metres, the Bmw 840i Convertible continues to build its lead. At 600 metres, it runs at 190 km/h versus 178 km/h. At 1,000 metres, the Bmw 840i Convertible finishes in 24.82 s versus 26.38 s, with a 1.56 s lead.
Both rivals are electronically governed, but not at the same level: the Bmw 840i Convertible is capped at 250 (i.e. 155 mph - industry threshold) km/h, the P7i at 200 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.
Instant electric torque gives an advantage off the line. The higher top speed of the combustion engine gives an advantage over longer distances. The distance at which one catches the other depends on the top speed differential.
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 9.78 seconds. The 0.74 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 Convertible G15 wins (5,57 s vs 6,31 s).
840i Convertible G15 goes from 0 to 100 km/h in 5,57 seconds (calibrated simulation).
840i Convertible G15: 333 hp, ratio 5,53 kg/hp. P7i: 282 hp, ratio 7,18 kg/hp.
840i Convertible G15: 250 km/h. P7i: 200 km/h.