Over 0–100 km/h, 123 xDrive F70 wins (6,36 s vs 6,91 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.
| 123 xDrive F70 | 120i F40 | |
|---|---|---|
| 0–100 km/h | 6,36 s−0,55 s | 6,91 s |
| 400 m standing start | 14,55 s−0,47 s | 15,02 s |
| 1,000 m standing start | 26,62 s−0,47 s | 27,09 s |
| Top speed (electronically limited) | 246 km/h+11 km/h | 235 km/h |
| Power-to-weight ratio | 7,02 kg/hpbetter ratio | 7,81 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 | 123 xDrive F70 | 120i F40 |
|---|---|---|
| 0–30 km/h | 1,42 s | 1,76 s |
| 0–50 km/h | 2,39 s | 2,94 s |
| 0–80 km/h | 4,40 s | 4,96 s |
| 0–100 km/h | 6,36 s | 6,91 s |
| 0–120 km/h | 8,71 s | 9,21 s |
| 0–160 km/h | 15,55 s | 16,06 s |
| 0–200 km/h | 27,54 s | 27,89 s |
| 400 m standing start | 14,55 s | 15,02 s |
| 1,000 m standing start | 26,62 s | 27,09 s |
| Top speed | 246 km/h | 235 km/h |
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| 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 |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 178 hp | 4 cyl |
| Torque | 280 Nm | |
| Weight | 1 390 kg | manufacturer kerb weight |
| Drivetrain | Traction | |
| Gearbox | Seven-speed Steptronic dual-clutch transmission |
Off the line, the Bmw 123 xDrive hits 100 km/h in 6.36 s versus 6.91 s for the Bmw 120i. At this point, the Bmw 123 xDrive leads by 0.55 s and sits roughly 11 m ahead.
At 200 metres, the Bmw 123 xDrive is doing 125 km/h against 124 km/h for the Bmw 120i. The gap is 0.44 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 123 xDrive crosses the line in 14.55 s versus 15.02 s. The 0.47 s gap represents roughly 20 m of track - two to three car lengths.
Past 400 metres, the Bmw 123 xDrive continues to build its lead. At 600 metres, it runs at 174 km/h versus 174 km/h. At 1,000 metres, the Bmw 123 xDrive finishes in 26.62 s versus 27.09 s, with a 0.47 s lead. Both vehicles have similar top speeds (246 vs 235 km/h), preventing any comeback.
The Bmw 123 xDrive features all-wheel drive (AWD) against the Bmw 120i’s FWD. 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 123 xDrive is capped at 246 km/h, the Bmw 120i at 235 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 (7.02 kg/hp vs 7.81 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.76 seconds. The 0.55 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, 123 xDrive F70 wins (6,36 s vs 6,91 s).
123 xDrive F70 goes from 0 to 100 km/h in 6,36 seconds (calibrated simulation).
123 xDrive F70: 218 hp, ratio 7,02 kg/hp. 120i F40: 178 hp, ratio 7,81 kg/hp.
123 xDrive F70: 246 km/h. 120i F40: 235 km/h.