Porsche 911 Targa 4 GTS 991.2 vs Bmw M340i xDrive G20 : 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 92%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 92 %.
911 Targa 4 GTS vs Bmw M340i xDrive: chronicle of a drag race at 307 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Targa 4 GTS hits 100 km/h in 3.66 s versus 4.32 s for the Bmw M340i xDrive. At this point, the 911 Targa 4 GTS leads by 0.67 s and sits roughly 2 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 911 Targa 4 GTS is doing 162 km/h against 147 km/h for the Bmw M340i xDrive. The gap is 0.51 s. The challenger starts to claw back ground.
At 400 metres standing start, the 911 Targa 4 GTS crosses the line in 11.57 s versus 12.46 s. The 0.90 s gap represents roughly 45 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Targa 4 GTS continues to build its lead. At 600 metres, it runs at 224 km/h versus 206 km/h. At 1,000 metres, the 911 Targa 4 GTS finishes in 20.93 s versus 22.65 s, with a 1.71 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 911 Targa 4 GTS is capped at 307 km/h, the Bmw M340i xDrive at 250 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 (3.48 kg/hp vs 4.77 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.58 seconds. The 0.67 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Targa 4 GTS has a clear edge over the Bmw M340i xDrive to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.