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AM235iPetrolvsB420dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsM235i · 420d

BMW M235i xDrive Gran Coupe F44 vs BMW 420d F32: 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.

compact · 2020 vs 2020 · Methodology
BMWPetrolFaster

M235i xDrive Gran Coupe F44

306 hp · 450 Nm · 1,570 kg · 2020

VS
BMWDiesel

420d F32

190 hp · 400 Nm · 1,605 kg · 2020

Result · 0–100 km/h

ABMW M235i xDrive Gran Coupe F44

4.85 s

Gap2.19 sin favour of M235i xDrive Gran Coupe
BBMW 420d F32

7.04 s

Summary · Caralogy simulation
MeasureM235i xDrive Gran Coupe F44420d F32Gap
0–100 km/h4.85 s7.04 s2.19 s · M235i xDrive Gran Coupe F44
400 m standing start13.05 s15.11 s2.06 s · M235i xDrive Gran Coupe F44
1,000 m standing start23.59 s27.78 s4.19 s · M235i xDrive Gran Coupe F44
Top speed (electronically limited)250 km/h240 km/h10 km/h · M235i xDrive Gran Coupe F44
Power-to-weight ratio5.13 kg/hp8.45 kg/hpbetter ratio · M235i xDrive Gran Coupe F44

Watch the race

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

BMWPetrolM235i xDrive Gran Coupe F44
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel420d F32
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.
StageM235i xDrive Gran Coupe F44420d F32
0–30 km/h1.32 s · tight gap1.37 s
0–50 km/h2.21 s2.40 s
0–80 km/h3.58 s4.80 s
0–100 km/h4.85 s7.04 s
0–120 km/h6.38 s9.85 s
0–160 km/h10.56 s18.13 s
0–200 km/h16.99 s33.30 s
400 m standing start13.05 s15.11 s
1,000 m standing start23.59 s27.78 s
Top speed limited250 km/h240 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

M235i xDrive Gran Coupe F44

5,13kg/hpratio better by 3,32 kg/hp
CharacteristicValueDetail
Power306 hp4 cyl
Torque450 Nm
Weight1 570 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic Sport transmission
BMW

420d F32

8,45kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 605 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the M235i xDrive Gran Coupe hits 100 km/h in 4.85 s versus 7.04 s for the 420d. At this point, the M235i xDrive Gran Coupe leads by 2.19 s and sits roughly 10 m ahead.

From 100 km/h to 400 metres

At 200 metres, the M235i xDrive Gran Coupe is doing 143 km/h against 119 km/h for the 420d. The gap is 1.15 s. The challenger starts to claw back ground.

At 400 metres standing start, the M235i xDrive Gran Coupe crosses the line in 13.04 s versus 15.10 s. The 2.06 s gap represents roughly 82 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the M235i xDrive Gran Coupe continues to build its lead. At 600 metres, it runs at 199 km/h versus 166 km/h. At 1,000 metres, the M235i xDrive Gran Coupe finishes in 23.59 s versus 27.77 s, with a 4.19 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 240 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the M235i xDrive Gran Coupe is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 420d at 240 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 (5.13 kg/hp vs 8.45 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.60 seconds. The 2.19 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, M235i xDrive Gran Coupe F44 wins (4,85 s vs 7,04 s).

M235i xDrive Gran Coupe F44 goes from 0 to 100 km/h in 4,85 seconds (calibrated simulation).

M235i xDrive Gran Coupe F44: 306 hp, ratio 5,13 kg/hp. 420d F32: 190 hp, ratio 8,45 kg/hp.

M235i xDrive Gran Coupe F44: 250 km/h. 420d F32: 240 km/h.