Bmw 840i Gran Coupe G15 vs Renault Megane 4 RS 280 : 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 94%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 94 %.
Bmw 840i Gran Coupe vs Megane 4 RS 280: chronicle of a drag race at 250 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw 840i Gran Coupe hits 100 km/h in 5.46 s versus 5.80 s for the Megane 4 RS 280. At this point, the Bmw 840i Gran Coupe leads by 0.34 s and sits roughly 7 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Bmw 840i Gran Coupe is doing 137 km/h against 138 km/h for the Megane 4 RS 280. The gap is 0.23 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 840i Gran Coupe crosses the line in 13.69 s versus 13.86 s. The 0.17 s gap represents roughly 8 m of track — barely a car length.
Beyond 400 metres: top speed comes into play
Past 400 metres, the gap narrows.
At 1,000 metres, the Bmw 840i Gran Coupe finishes in 24.68 s versus 24.70 s, with just 0.02 s to spare. The Megane 4 RS 280 fails to fully close the launch gap.
What the numbers don’t tell you
Both rivals share the same electronic speed cap: the Bmw 840i Gran Coupe and the Megane 4 RS 280 are governed to 250 km/h. At that speed, standard-fit tyres approach their safety threshold — an industrial ceiling common to most electric vehicles in this segment. Neither car shows its true aerodynamic potential in this duel.
With two combustion powertrains, the difference comes down to power-to-weight ratio (5.45 kg/hp vs 5.18 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.37 seconds. The 0.34 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw 840i Gran Coupe is slightly faster than the Renault Megane 4 RS 280 to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.