Over 0–100 km/h, 128ti F40 and 123 xDrive F70 are neck and neck (6,27 s vs 6,36 s, no significant gap).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | 128ti F40 | 123 xDrive F70 | Gap |
|---|---|---|---|
| 0–100 km/h | 6.27 s | 6.36 s | 0.09 s · 128ti F40 |
| 400 m standing start | 14.44 s | 14.55 s | 0.11 s · 128ti F40 |
| 1,000 m standing start | 25.87 s | 26.62 s | 0.75 s · 128ti F40 |
| Top speed (electronically limited) | 250 km/h | 246 km/h | 4 km/h · 128ti F40 |
| Power-to-weight ratio | 5.45 kg/hp | 7.02 kg/hp | better ratio · 128ti F40 |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | 128ti F40 | 123 xDrive F70 |
|---|---|---|
| 0–30 km/h | 1.81 s | 1.42 s |
| 0–50 km/h | 3.01 s | 2.39 s |
| 0–80 km/h | 4.76 s | 4.40 s |
| 0–100 km/h | 6.27 s · tight gap | 6.36 s |
| 0–120 km/h | 8.20 s | 8.71 s |
| 0–160 km/h | 13.63 s | 15.55 s |
| 0–200 km/h | 22.97 s | 27.54 s |
| 400 m standing start | 14.44 s · tight gap | 14.55 s |
| 1,000 m standing start | 25.87 s | 26.62 s |
| Top speed limited | 250 km/h | 246 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 | 265 hp | 4 cyl |
| Torque | 400 Nm | |
| Weight | 1 445 kg | manufacturer kerb weight |
| Drivetrain | - | |
| Gearbox | Eight-speed Steptronic Sport transmission |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 218 hp | 4 cyl |
| Torque | 320 Nm | |
| Weight | 1 530 kg | manufacturer kerb weight |
| Drivetrain | Integrale (AWD) | |
| Gearbox | 7-speed Steptronic transmission with dual clutch |
Off the line, the 128ti hits 100 km/h in 6.27 s versus 6.36 s for the 123 xDrive. The 0.09 s gap is negligible: both vehicles are neck and neck.
At 200 metres, the 123 xDrive is doing 125 km/h against 132 km/h for the 128ti. The gap is 0.18 s. The gap widens compared to the 0-100.
At 400 metres standing start, the 128ti crosses the line in 14.44 s versus 14.55 s. The 0.11 s gap represents roughly 5 m of track - barely a car length.
Past 400 metres, the 128ti continues to build its lead. At 600 metres, it runs at 184 km/h versus 174 km/h. At 1,000 metres, the 128ti finishes in 25.86 s versus 26.62 s, with a 0.75 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 246 km/h), preventing any comeback.
Both rivals are electronically governed, but not at the same level: the 128ti is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 123 xDrive at 246 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 (5.45 kg/hp vs 7.02 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.11 seconds. The 0.09 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, 128ti F40 and 123 xDrive F70 are neck and neck (6,27 s vs 6,36 s, no significant gap).
128ti F40 goes from 0 to 100 km/h in 6,27 seconds (calibrated simulation).
128ti F40: 265 hp, ratio 5,45 kg/hp. 123 xDrive F70: 218 hp, ratio 7,02 kg/hp.
128ti F40: 250 km/h. 123 xDrive F70: 246 km/h.