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AM4vsBBoxsterPetrol
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  • SpecsM4 · Boxster

BMW M4 Convertible F82 vs Porsche Boxster Spyder: 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 · 2018 vs 2016 · Methodology
BMWPetrol

M4 Convertible F82

431 hp · 550 Nm · 1,790 kg · 2018

VS
PorschePetrolFaster

Boxster Spyder

375 hp · 420 Nm · 1,315 kg · 2016

Result · 0–100 km/h

ABMW M4 Convertible F82

4.69 s

Gap0.10 sin favour of Boxster Spyder
BPorsche Boxster Spyder

4.58 s

Summary · Caralogy simulation
MeasureM4 Convertible F82Boxster SpyderGap
0–100 km/h4.69 s4.58 s0.10 s · Boxster Spyder
400 m standing start12.65 s12.41 s0.24 s · Boxster Spyder
1,000 m standing start22.52 s22.16 s0.36 s · Boxster Spyder
Top speed (electronically limited)250 km/h288 km/h38 km/h · Boxster Spyder
Power-to-weight ratio4.15 kg/hp3.51 kg/hpbetter ratio · Boxster Spyder

Watch the race

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

BMWPetrolM4 Convertible F82
Speed
0km/h
Timer
0,00s
Distance
0m
PorschePetrolBoxster Spyder
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 Convertible F82Boxster Spyder
0–30 km/h1.38 s1.26 s · tight gap
0–50 km/h2.29 s2.11 s
0–80 km/h3.63 s · tight gap3.65 s
0–100 km/h4.69 s4.58 s · tight gap
0–120 km/h5.96 s5.62 s
0–160 km/h9.29 s8.74 s
0–200 km/h14.14 s13.32 s
400 m standing start12.65 s12.41 s
1,000 m standing start22.52 s22.16 s
Top speed limited250 km/h288 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 Convertible F82

4,15kg/hpcompensated by −475 kg
CharacteristicValueDetail
Power431 hp6 cyl
Torque550 Nm
Weight1 790 kgmanufacturer kerb weight
Drivetrain-
Gearbox6-speed manual (7-speed M Steptronic with double clutch and Drivelogic)
Porsche

Boxster Spyder

3,51kg/hpratio better by 0,65 kg/hp
CharacteristicValueDetail
Power375 hpB6
Torque420 Nm
Weight1 315 kgmanufacturer kerb weight
DrivetrainPropulsion
GearboxMANUAL

The start: 0 to 100 km/h

Off the line, the Boxster Spyder hits 100 km/h in 4.59 s versus 4.69 s for the M4 Convertible. At this point, the Boxster Spyder leads by 0.10 s and sits roughly 3 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Boxster Spyder is doing 154 km/h against 151 km/h for the M4 Convertible. The gap is 0.15 s. The gap remains stable from the start.

At 400 metres standing start, the Boxster Spyder crosses the line in 12.41 s versus 12.64 s. The 0.24 s gap represents roughly 12 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Boxster Spyder continues to build its lead. At 600 metres, it runs at 216 km/h versus 213 km/h. At 1,000 metres, the Boxster Spyder finishes in 22.15 s versus 22.51 s, with a 0.36 s lead.

What the numbers don’t tell you

Electronically capped at 250 (i.e. 155 mph - industry threshold) km/h, the M4 Convertible never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor - it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.

With two combustion powertrains, the difference comes down to power-to-weight ratio (4.15 kg/hp vs 3.51 kg/hp) and transmission (Automatic vs Manual).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.66 seconds. The 0.10 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 Convertible F82
BMW Z4 M40iBMW Z4 M40i

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Boxster Spyder vs Z4 M40i

Frequently asked questions

Over 0–100 km/h, Boxster Spyder wins (4,58 s vs 4,69 s).

M4 Convertible F82 goes from 0 to 100 km/h in 4,69 seconds (calibrated simulation).

M4 Convertible F82: 431 hp, ratio 4,15 kg/hp. Boxster Spyder: 375 hp, ratio 3,51 kg/hp.

M4 Convertible F82: 250 km/h. Boxster Spyder: 288 km/h.