Bmw 120i vs SEAT Leon 1.4 TSI 150 7DSG : which one is faster?
0-100 km/h, 400 m, 1000 m, top speed — physics simulation calibrated on 7 measures.
Simulation de performance
Race simulation at real speed
CONFIDENCE 96%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 96 %.
Bmw 120i vs Leon 1.4 TSI 150 7DSG: chronicle of a drag race at 235 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw 120i hits 100 km/h in 6.95 s versus 8.91 s for the Leon 1.4 TSI 150 7DSG. At this point, the Bmw 120i leads by 1.96 s and sits roughly 29 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Bmw 120i is doing 123 km/h against 116 km/h for the Leon 1.4 TSI 150 7DSG. The gap is 1.37 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 120i crosses the line in 15.05 s versus 16.69 s. The 1.64 s gap represents roughly 64 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Bmw 120i continues to build its lead. At 600 metres, it runs at 171 km/h versus 162 km/h. At 1,000 metres, the Bmw 120i finishes in 27.31 s versus 29.64 s, with a 2.33 s lead. Both vehicles have similar top speeds (235 vs 223 km/h), preventing any comeback.
What the numbers don’t tell you
Electronically capped at 235 km/h, the Bmw 120i never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor — it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.
With two combustion powertrains, the difference comes down to power-to-weight ratio (7.81 kg/hp vs 8.60 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 13.60 seconds. The 1.96 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw 120i has a clear edge over the SEAT Leon 1.4 TSI 150 7DSG to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.