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A840dHybridvsB740LePHEV
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs840d · 740Le

BMW 840d xDrive Convertible G15 vs BMW 740Le iPerformance G11: which is truly faster?

Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.

limousine · 2020 vs 2018 · Methodology
BMWHybridFaster

840d xDrive Convertible G15

340 hp · 700 Nm · 2,030 kg · 2020

VS
BMWPHEV

740Le iPerformance G11

326 hp · 400 Nm · 1,940 kg · 2018

Result · 0–100 km/h

ABMW 840d xDrive Convertible G15

5.06 s

Gap0.52 sin favour of 840d xDrive Convertible
BBMW 740Le iPerformance G11

5.58 s

Summary · Caralogy simulation
Measure840d xDrive Convertible G15740Le iPerformance G11Gap
0–100 km/h5.06 s5.58 s0.52 s · 840d xDrive Convertible G15
400 m standing start13.37 s13.77 s0.40 s · 840d xDrive Convertible G15
1,000 m standing start24.39 s25.05 s0.66 s · 840d xDrive Convertible G15
Top speed (electronically limited)250 km/h250 km/hSame
Power-to-weight ratio5.97 kg/hp5.95 kg/hpbetter ratio · 740Le iPerformance G11

Watch the race

Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.

BMWHybrid840d xDrive Convertible G15
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPHEV740Le iPerformance G11
Speed
0km/h
Timer
0,00s
Distance
0m
100 m
200 m
300 m
400 m
500 m
600 m
700 m
800 m
900 m
1000 m
0m → 1000m
Gap0m

Stage-by-stage comparison

Simulated performance at each stage. Best value in bold.
Stage840d xDrive Convertible G15740Le iPerformance G11
0–30 km/h1.22 s · tight gap1.29 s
0–50 km/h2.01 s · tight gap2.14 s
0–80 km/h3.61 s3.85 s
0–100 km/h5.06 s5.58 s
0–120 km/h6.87 s7.52 s
0–160 km/h11.87 s12.85 s
0–200 km/h19.51 s21.11 s
400 m standing start13.37 s13.77 s
1,000 m standing start24.39 s25.05 s
Top speed limited250 km/h250 km/h

Parameters and assumptions

Simulation

Start
Standing, straight line
Surface
Dry asphalt, 23°C
Wind
None
Driver
1 person, 75 kg

Calibration

Splits
0–100, 0–200 manufacturer
Power curve
Real measurement (Caralogy)
VMax
Manufacturer limited
Transmission
Losses integrated in model

Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

BMW

840d xDrive Convertible G15

5,97kg/hpcompensated by −90 kg
CharacteristicValueDetail
Power340 hpPending
Torque700 Nm
Weight2 030 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic
BMW

740Le iPerformance G11

5,95kg/hpratio better by 0,02 kg/hp
CharacteristicValueDetail
Power326 hp4 cyl
Torque400 Nm
Weight1 940 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the 840d xDrive Convertible hits 100 km/h in 5.06 s versus 5.58 s for the 740Le iPerformance. Despite lacking instant torque, 340 hp of power compensates. At this point, the 840d xDrive Convertible leads by 0.52 s and sits roughly 4 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 840d xDrive Convertible is doing 136 km/h against 132 km/h for the 740Le iPerformance. The gap is 0.28 s. The challenger starts to claw back ground.

At 400 metres standing start, the 840d xDrive Convertible crosses the line in 13.36 s versus 13.77 s. The 0.41 s gap represents roughly 19 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 840d xDrive Convertible continues to build its lead. At 600 metres, it runs at 190 km/h versus 186 km/h. At 1,000 metres, the 840d xDrive Convertible finishes in 24.38 s versus 25.05 s, with a 0.67 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 250 (i.e. 155 mph - industry threshold) km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals share the same electronic speed cap: the 840d xDrive Convertible and the 740Le iPerformance are governed to 250 (i.e. 155 mph - industry threshold) 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.

Instant electric torque gives an advantage off the line. The higher top speed of the combustion engine gives an advantage over longer distances. The distance at which one catches the other depends on the top speed differential.

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.68 seconds. The 0.52 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

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Frequently asked questions

Over 0–100 km/h, 840d xDrive Convertible G15 wins (5,06 s vs 5,58 s).

840d xDrive Convertible G15 goes from 0 to 100 km/h in 5,06 seconds (calibrated simulation).

840d xDrive Convertible G15: 340 hp, ratio 5,97 kg/hp. 740Le iPerformance G11: 326 hp, ratio 5,95 kg/hp.

840d xDrive Convertible G15: 250 km/h. 740Le iPerformance G11: 250 km/h.