Over 0–100 km/h, Boxster S 981 wins (5,08 s vs 5,57 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 | Boxster S 981 | |
|---|---|---|
| 0–100 km/h | 5,57 s | 5,08 s+0,50 s |
| 400 m standing start | 13,79 s | 13,23 s+0,56 s |
| 1,000 m standing start | 24,82 s | 23,87 s+0,95 s |
| Top speed (electronically limited) | 250 km/h | 262 km/h−12 km/h |
| Power-to-weight ratio | 5,53 kg/hp | 4,32 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 Convertible G15 | Boxster S 981 |
|---|---|---|
| 0–30 km/h | 1,54 s | 1,43 stight gap |
| 0–50 km/h | 2,50 s | 2,38 stight gap |
| 0–80 km/h | 4,11 s | 3,91 s |
| 0–100 km/h | 5,57 s | 5,08 s |
| 0–120 km/h | 7,39 s | 6,61 s |
| 0–160 km/h | 12,34 s | 10,72 s |
| 0–200 km/h | 19,98 s | 17,41 s |
| 400 m standing start | 13,79 s | 13,23 s |
| 1,000 m standing start | 24,82 s | 23,87 s |
| Top speed limited | 250 km/h | 262 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 | 314 hp | Engine block and cylinder heads formed in aluminum |
| Torque | 361 Nm | |
| Weight | 1 355 kg | manufacturer kerb weight |
| Drivetrain | Propulsion | |
| Gearbox | 6 speed standard |
Off the line, the Boxster S hits 100 km/h in 5.08 s versus 5.57 s for the Bmw 840i Convertible. At this point, the Boxster S leads by 0.50 s and sits roughly 4 m ahead.
At 200 metres, the Boxster S is doing 143 km/h against 136 km/h for the Bmw 840i Convertible. The gap is 0.33 s. The challenger starts to claw back ground.
At 400 metres standing start, the Boxster S crosses the line in 13.23 s versus 13.79 s. The 0.56 s gap represents roughly 26 m of track - two to three car lengths.
Past 400 metres, the Boxster S continues to build its lead. At 600 metres, it runs at 198 km/h versus 190 km/h. At 1,000 metres, the Boxster S finishes in 23.87 s versus 24.82 s, with a 0.95 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 262 km/h), preventing any comeback.
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 Boxster S at 274 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 (5.53 kg/hp vs 4.32 kg/hp) and transmission (Automatic vs Unknown).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.44 seconds. The 0.50 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, Boxster S 981 wins (5,08 s vs 5,57 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. Boxster S 981: 314 hp, ratio 4,32 kg/hp.
840i Convertible G15: 250 km/h. Boxster S 981: 262 km/h.