Over 0–100 km/h, S8 wins (3,83 s vs 3,96 s).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | S8 | M850i xDrive Convertible G15 | Gap |
|---|---|---|---|
| 0–100 km/h | 3.83 s | 3.96 s | 0.13 s · S8 |
| 400 m standing start | 11.81 s | 11.83 s | 0.02 s · S8 |
| 1,000 m standing start | 21.27 s | 21.13 s | 0.14 s · M850i xDrive Convertible G15 |
| Top speed (electronically limited) | 250 km/h | 250 km/h | Same |
| Power-to-weight ratio | 3.89 kg/hp | 3.87 kg/hp | better ratio · M850i xDrive Convertible G15 |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | S8 | M850i xDrive Convertible G15 |
|---|---|---|
| 0–30 km/h | 1.07 s · tight gap | 1.22 s |
| 0–50 km/h | 1.78 s | 1.99 s |
| 0–80 km/h | 2.88 s | 3.10 s |
| 0–100 km/h | 3.83 s · tight gap | 3.96 s |
| 0–120 km/h | 4.97 s · tight gap | 5.00 s |
| 0–160 km/h | 7.99 s | 7.79 s |
| 0–200 km/h | 12.24 s | 11.74 s |
| 400 m standing start | 11.81 s · tight gap | 11.83 s |
| 1,000 m standing start | 21.27 s | 21.13 s · tight gap |
| Top speed limited | 250 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 | 571 hp | Pending |
| Torque | 800 Nm | |
| Weight | 2 220 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed tiptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 530 hp | 8 cyl |
| Torque | 750 Nm | |
| Weight | 2 050 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 8-speed Steptronic |
Off the line, the S8 hits 100 km/h in 3.83 s versus 3.96 s for the M850i xDrive Convertible. At this point, the S8 leads by 0.13 s and sits roughly 5 m ahead.
At 200 metres, the S8 is doing 157 km/h against 161 km/h for the M850i xDrive Convertible. The gap is 0.10 s. The gap remains stable from the start.
At 400 metres standing start, the S8 crosses the line in 11.81 s versus 11.82 s. The 0.02 s gap represents roughly 1 m of track
Past 400 metres, the situation changes. Past 400 metres, both rivals hit the same electronic ceiling at 250 (i.e. 155 mph - industry threshold) km/h. Neither can claw back ground through top speed - the outcome hinges on the acceleration curve between 100 and 250 (i.e. 155 mph - industry threshold) km/h.
At 1,000 metres, the M850i xDrive Convertible finishes in 21.13 s versus 21.26 s. The 0.14 s delta shows an extremely tight race.
Both rivals share the same electronic speed cap: the S8 and the M850i xDrive Convertible are governed to 250 (i.e. 155 mph - industry threshold) km/h. At that speed, standard-fit tyres approach their safety threshold - an industrial ceiling common to most electric vehicles in this segment. Neither car shows its true aerodynamic potential in this duel.
With two combustion powertrains, the difference comes down to power-to-weight ratio (3.89 kg/hp vs 3.87 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 5.62 seconds. The 0.13 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, S8 wins (3,83 s vs 3,96 s).
S8 goes from 0 to 100 km/h in 3,83 seconds (calibrated simulation).
S8: 571 hp, ratio 3,89 kg/hp. M850i xDrive Convertible G15: 530 hp, ratio 3,87 kg/hp.
S8: 250 km/h. M850i xDrive Convertible G15: 250 km/h.