Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Duel
  3. /Sports Cars
ABoxstervsB420iPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsBoxster · 420i

Porsche Boxster S vs BMW 420i xDrive G22: 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.

sports car · 2012 vs 2021 · Methodology
PorschePetrolFaster

Boxster S

314 hp · 361 Nm · 1,355 kg · 2012

VS
BMWPetrol

420i xDrive G22

184 hp · 300 Nm · 1,590 kg · 2021

Result · 0–100 km/h

APorsche Boxster S

5.08 s

Gap2.67 sin favour of Boxster S
BBMW 420i xDrive G22

7.74 s

Summary · Caralogy simulation
MeasureBoxster S420i xDrive G22Gap
0–100 km/h5.08 s7.74 s2.67 s · Boxster S
400 m standing start13.23 s15.61 s2.38 s · Boxster S
1,000 m standing start23.87 s28.72 s4.85 s · Boxster S
Top speed (electronically limited)262 km/h234 km/h28 km/h · Boxster S
Power-to-weight ratio4.32 kg/hp8.64 kg/hpbetter ratio · Boxster S

Watch the race

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

PorschePetrolBoxster S
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol420i xDrive G22
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.
StageBoxster S420i xDrive G22
0–30 km/h1.43 s1.38 s · tight gap
0–50 km/h2.38 s2.58 s
0–80 km/h3.91 s5.26 s
0–100 km/h5.08 s7.74 s
0–120 km/h6.61 s10.94 s
0–160 km/h10.72 s20.29 s
0–200 km/h17.41 s38.25 s
400 m standing start13.23 s15.61 s
1,000 m standing start23.87 s28.72 s
Top speed262 km/h234 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.

Porsche

Boxster S

4,32kg/hpratio better by 4,33 kg/hp
CharacteristicValueDetail
Power314 hpEngine block and cylinder heads formed in aluminum
Torque361 Nm
Weight1 355 kgmanufacturer kerb weight
DrivetrainPropulsion
Gearbox6 speed standard
BMW

420i xDrive G22

8,64kg/hpcompensated by −235 kg
CharacteristicValueDetail
Power184 hpPending
Torque300 Nm
Weight1 590 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the Boxster S hits 100 km/h in 5.08 s versus 7.74 s for the 420i xDrive. At this point, the Boxster S leads by 2.67 s and sits roughly 9 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Boxster S is doing 143 km/h against 115 km/h for the 420i xDrive. The gap is 1.28 s. The challenger starts to claw back ground.

At 400 metres standing start, the Boxster S crosses the line in 13.23 s versus 15.61 s. The 2.38 s gap represents roughly 91 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Boxster S continues to build its lead. At 600 metres, it runs at 198 km/h versus 160 km/h. At 1,000 metres, the Boxster S finishes in 23.87 s versus 28.71 s, with a 4.85 s lead.

What the numbers don’t tell you

The 420i xDrive features all-wheel drive (AWD) against the Boxster S’s RWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.

Both rivals are electronically governed, but not at the same level: the Boxster S is capped at 274 km/h, the 420i xDrive at 238 km/h. This isn’t a physical engine limit - it’s a manufacturer choice, usually for tyre safety or homologation reasons. Neither car reaches its true aerodynamic top speed.

With two combustion powertrains, the difference comes down to power-to-weight ratio (4.32 kg/hp vs 8.64 kg/hp) and transmission (Unknown vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.85 seconds. The 2.67 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Other duels you might be interested in

PorscheVSJaguar

Boxster S vs F-TYPE P300

AudiVSBMW

A4 40 TFSI vs 420i xDrive

BMWVSPorsche

Z4 M40i vs Boxster S

AudiVSBMW

A5 Avant vs 420i xDrive

Frequently asked questions

Over 0–100 km/h, Boxster S wins (5,08 s vs 7,74 s).

Boxster S goes from 0 to 100 km/h in 5,08 seconds (calibrated simulation).

Boxster S: 314 hp, ratio 4,32 kg/hp. 420i xDrive G22: 184 hp, ratio 8,64 kg/hp.

Boxster S: 262 km/h. 420i xDrive G22: 234 km/h.