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Home›Duel›BMW M4 vs BMW Z4

Performance comparison

BMW M4 Competition Convertible F82 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.

BMWPetrolFaster

M4 Competition Convertible F82

450 hp · 550 Nm · 1,790 kg · 2018

VS
BMWPetrol

Z4 M40i G29

340 hp · 500 Nm · 1,535 kg · 2018

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO

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.

M4 Competition Convertible F82Z4 M40i G29
0–100 km/h4,43 s−0,11 s4,54 s
400 m standing start12,51 s−0,19 s12,70 s
1,000 m standing start22,55 s−0,40 s22,95 s
Top speed (electronically limited)250 km/h250 km/h
Power-to-weight ratio3,98 kg/hpbetter ratio4,51 kg/hp

Watch the race

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

BMWPetrolM4 Competition Convertible F82
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. Winner in green.

PalierM4 Competition Convertible F82Z4 M40i G29
0–30 km/h1,16 s1,27 stight gap
0–50 km/h1,94 s2,12 s
0–80 km/h3,25 s3,42 s
0–100 km/h4,43 s4,54 stight gap
0–120 km/h5,80 s5,95 stight gap
0–160 km/h9,41 s9,74 s
0–200 km/h14,54 s15,46 s
400 m standing start12,51 s12,70 s
1,000 m standing start22,55 s22,95 s
Top speed limited250 km/h250 km/h

Under the bonnet

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

BMW

M4 Competition Convertible F82

3,98kg/hpratio better by 0,54 kg/hp
CharacteristicValueDetail
Power450 hp6 cyl
Torque550 Nm
Weight1 790 kgmanufacturer kerb weight
Drivetrain—
Gearbox6-speed manual (7-speed M Steptronic with double clutch and Drivelogic)
BMW

Z4 M40i G29

4,51kg/hpcompensated by −255 kg
CharacteristicValueDetail
Power340 hp6 cyl
Torque500 Nm
Weight1 535 kgmanufacturer kerb weight
DrivetrainZ4 M40i
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the Bmw M4 Competition Convertible hits 100 km/h in 4.43 s versus 4.54 s for the Bmw Z4 M40i. At this point, the Bmw M4 Competition Convertible leads by 0.11 s and sits roughly 3 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Bmw M4 Competition Convertible is doing 148 km/h against 147 km/h for the Bmw Z4 M40i. The gap is 0.14 s. The gap remains stable from the start.

At 400 metres standing start, the Bmw M4 Competition Convertible crosses the line in 12.51 s versus 12.70 s. The 0.19 s gap represents roughly 10 m of track — barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Bmw M4 Competition Convertible continues to build its lead. At 600 metres, it runs at 209 km/h versus 205 km/h. At 1,000 metres, the Bmw M4 Competition Convertible finishes in 22.55 s versus 22.95 s, with a 0.39 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 Bmw M4 Competition Convertible and the Bmw 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 (3.98 kg/hp vs 4.51 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.76 seconds. The 0.11 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Compare with other alternatives

Swap one of the two models to explore an equivalent duel in the same segment.

Instead of M4 Competition Convertible F82
Mercedes Maybach SL 680 Monogram Series RoadsterBmw 840i xDrive ConvertibleBmw 840i Convertible
Instead of Z4 M40i G29
Bmw 840i xDrive ConvertibleBmw 230i ConvertibleBmw Z4 sDrive30i

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M4 Competition Convertible vs Maybach SL 680 Monogram Series Roadster

BmwVSMercedes

840i xDrive Convertible vs Maybach SL 680 Monogram Series Roadster

Frequently asked questions

Sur 0–100 km/h, M4 Competition Convertible F82 gagne (4,43 s vs 4,54 s).

M4 Competition Convertible F82 passe de 0 à 100 km/h en 4,43 secondes (simulation calibrée).

M4 Competition Convertible F82 : 450 hp, ratio 3,98 kg/hp. Z4 M40i G29 : 340 hp, ratio 4,51 kg/hp.

M4 Competition Convertible F82 : 250 km/h. Z4 M40i G29 : 250 km/h.