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AM850ivsBM4Petrol
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  • SpecsM850i · M4

BMW M850i xDrive Gran Coupe G15 vs BMW M4 F82: 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 · 2021 vs 2020 · Methodology
BMWPetrolFaster

M850i xDrive Gran Coupe G15

530 hp · 750 Nm · 2,010 kg · 2021

VS
BMWPetrol

M4 F82

480 hp · 550 Nm · 1,700 kg · 2020

Result · 0–100 km/h

ABMW M850i xDrive Gran Coupe G15

3.93 s

Gap0.31 sin favour of M850i xDrive Gran Coupe
BBMW M4 F82

4.24 s

Summary · Caralogy simulation
MeasureM850i xDrive Gran Coupe G15M4 F82Gap
0–100 km/h3.93 s4.24 s0.31 s · M850i xDrive Gran Coupe G15
400 m standing start11.88 s12.38 s0.50 s · M850i xDrive Gran Coupe G15
1,000 m standing start21.34 s22.29 s0.95 s · M850i xDrive Gran Coupe G15
Top speed (electronically limited)250 km/h250 km/hSame
Power-to-weight ratio3.79 kg/hp3.54 kg/hpbetter ratio · M4 F82

Watch the race

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

BMWPetrolM850i xDrive Gran Coupe G15
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrolM4 F82
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.
StageM850i xDrive Gran Coupe G15M4 F82
0–30 km/h1.17 s1.14 s · tight gap
0–50 km/h1.92 s1.90 s · tight gap
0–80 km/h3.04 s3.25 s
0–100 km/h3.93 s4.24 s
0–120 km/h5.03 s5.70 s
0–160 km/h7.97 s9.14 s
0–200 km/h12.21 s14.04 s
400 m standing start11.88 s12.38 s
1,000 m standing start21.34 s22.29 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

M850i xDrive Gran Coupe G15

3,79kg/hpcompensated by −310 kg
CharacteristicValueDetail
Power530 hp8 cyl
Torque750 Nm
Weight2 010 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic
BMW

M4 F82

3,54kg/hpratio better by 0,25 kg/hp
CharacteristicValueDetail
Power480 hpPending
Torque550 Nm
Weight1 700 kgmanufacturer kerb weight
Drivetrain-
GearboxSix-speed manual

The start: 0 to 100 km/h

Off the line, the M850i xDrive Gran Coupe hits 100 km/h in 3.93 s versus 4.24 s for the M4. At this point, the M850i xDrive Gran Coupe leads by 0.31 s and sits roughly 2 m ahead.

From 100 km/h to 400 metres

At 200 metres, the M850i xDrive Gran Coupe is doing 159 km/h against 151 km/h for the M4. The gap is 0.29 s. The gap remains stable from the start.

At 400 metres standing start, the M850i xDrive Gran Coupe crosses the line in 11.88 s versus 12.38 s. The 0.50 s gap represents roughly 26 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the M850i xDrive Gran Coupe continues to build its lead. At 600 metres, it runs at 222 km/h versus 212 km/h. At 1,000 metres, the M850i xDrive Gran Coupe finishes in 21.34 s versus 22.29 s, with a 0.95 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 M850i xDrive Gran Coupe and the M4 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.

With two combustion powertrains, the difference comes down to power-to-weight ratio (3.79 kg/hp vs 3.54 kg/hp) and transmission (Automatic vs Manual).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.44 seconds. The 0.31 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, M850i xDrive Gran Coupe G15 wins (3,93 s vs 4,24 s).

M850i xDrive Gran Coupe G15 goes from 0 to 100 km/h in 3,93 seconds (calibrated simulation).

M850i xDrive Gran Coupe G15: 530 hp, ratio 3,79 kg/hp. M4 F82: 480 hp, ratio 3,54 kg/hp.

M850i xDrive Gran Coupe G15: 250 km/h. M4 F82: 250 km/h.