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AM4vsBZ4Petrol
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  • SpecsM4 · Z4

BMW M4 G82 vs BMW Z4 M40i G29: 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.

saloon · 2024 vs 2021 · Methodology
BMWPetrolFaster

M4 G82

480 hp · 550 Nm · 1,700 kg · 2024

VS
BMWPetrol

Z4 M40i G29

340 hp · 500 Nm · 1,555 kg · 2021

Result · 0–100 km/h

ABMW M4 G82

4.19 s

Gap0.35 sin favour of M4
BBMW Z4 M40i G29

4.54 s

Summary · Caralogy simulation
MeasureM4 G82Z4 M40i G29Gap
0–100 km/h4.19 s4.54 s0.35 s · M4 G82
400 m standing start12.23 s12.72 s0.49 s · M4 G82
1,000 m standing start21.86 s23.00 s1.14 s · M4 G82
Top speed (electronically limited)250 km/h250 km/hSame
Power-to-weight ratio3.54 kg/hp4.57 kg/hpbetter ratio · M4 G82

Watch the race

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

BMWPetrolM4 G82
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrolZ4 M40i G29
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.
StageM4 G82Z4 M40i G29
0–30 km/h1.22 s · tight gap1.26 s
0–50 km/h2.04 s · tight gap2.11 s
0–80 km/h3.31 s · tight gap3.41 s
0–100 km/h4.19 s4.54 s
0–120 km/h5.52 s5.97 s
0–160 km/h8.63 s9.81 s
0–200 km/h13.02 s15.62 s
400 m standing start12.23 s12.72 s
1,000 m standing start21.86 s23.00 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

M4 G82

3,54kg/hpratio better by 1,03 kg/hp
CharacteristicValueDetail
Power480 hp6 cyl
Torque550 Nm
Weight1 700 kgmanufacturer kerb weight
Drivetrain-
GearboxSix-speed manual
BMW

Z4 M40i G29

4,57kg/hpcompensated by −145 kg
CharacteristicValueDetail
Power340 hp6 cyl
Torque500 Nm
Weight1 555 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the M4 hits 100 km/h in 4.19 s versus 4.55 s for the Z4 M40i. At this point, the M4 leads by 0.35 s and sits roughly 2 m ahead.

From 100 km/h to 400 metres

At 200 metres, the M4 is doing 155 km/h against 147 km/h for the Z4 M40i. The gap is 0.25 s. The challenger starts to claw back ground.

At 400 metres standing start, the M4 crosses the line in 12.23 s versus 12.71 s. The 0.49 s gap represents roughly 25 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the M4 continues to build its lead. At 600 metres, it runs at 219 km/h versus 204 km/h. At 1,000 metres, the M4 finishes in 21.86 s versus 23.00 s, with a 1.14 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 M4 and the Z4 M40i 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 (3.54 kg/hp vs 4.57 kg/hp) and transmission (Manual vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.79 seconds. The 0.35 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, M4 G82 wins (4,19 s vs 4,54 s).

M4 G82 goes from 0 to 100 km/h in 4,19 seconds (calibrated simulation).

M4 G82: 480 hp, ratio 3,54 kg/hp. Z4 M40i G29: 340 hp, ratio 4,57 kg/hp.

M4 G82: 250 km/h. Z4 M40i G29: 250 km/h.