Bmw M340i xDrive Touring G20 vs Porsche Boxster S 981 : 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 91%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 91 %.
Bmw M340i xDrive Touring vs Boxster S: chronicle of a drag race at 262 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw M340i xDrive Touring hits 100 km/h in 4.58 s versus 5.08 s for the Boxster S. At this point, the Bmw M340i xDrive Touring leads by 0.50 s and sits roughly 11 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Bmw M340i xDrive Touring is doing 145 km/h against 143 km/h for the Boxster S. The gap is 0.44 s. The gap remains stable from the start.
At 400 metres standing start, the Bmw M340i xDrive Touring crosses the line in 12.74 s versus 13.23 s. The 0.49 s gap represents roughly 24 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Bmw M340i xDrive Touring continues to build its lead. At 600 metres, it runs at 203 km/h versus 198 km/h. At 1,000 metres, the Bmw M340i xDrive Touring finishes in 23.11 s versus 23.87 s, with a 0.76 s lead. Both vehicles have similar top speeds (250 vs 262 km/h), preventing any comeback.
What the numbers don’t tell you
The Bmw M340i xDrive Touring features all-wheel drive (AWD) against the Boxster S’s RWD. 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 M340i xDrive Touring is capped at 250 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 (4.73 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 7.45 seconds. The 0.50 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw M340i xDrive Touring has a clear edge over the Porsche Boxster S to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.