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A120dvsB118dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs120d · 118d

BMW 120d F40 vs BMW 118d xDrive F20LCI: 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 · 2021 vs 2018 · Methodology
BMWDieselFaster

120d F40

190 hp · 400 Nm · 1,450 kg · 2021

VS
BMWDiesel

118d xDrive F20LCI

150 hp · 320 Nm · 1,470 kg · 2018

Result · 0–100 km/h

ABMW 120d F40

7.37 s

Gap1.25 sin favour of 120d
BBMW 118d xDrive F20LCI

8.62 s

Summary · Caralogy simulation
Measure120d F40118d xDrive F20LCIGap
0–100 km/h7.37 s8.62 s1.25 s · 120d F40
400 m standing start15.46 s16.29 s0.83 s · 120d F40
1,000 m standing start28.03 s29.87 s1.84 s · 120d F40
Top speed (electronically limited)230 km/h210 km/h20 km/h · 120d F40
Power-to-weight ratio7.63 kg/hp9.80 kg/hpbetter ratio · 120d F40

Watch the race

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

BMWDiesel120d F40
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel118d xDrive F20LCI
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.
Stage120d F40118d xDrive F20LCI
0–30 km/h1.93 s1.80 s · tight gap
0–50 km/h3.05 s3.05 s
0–80 km/h5.30 s5.89 s
0–100 km/h7.37 s8.62 s
0–120 km/h10.04 s12.06 s
0–160 km/h17.96 s23.03 s
0–200 km/h33.74 s52.90 s
400 m standing start15.46 s16.29 s
1,000 m standing start28.03 s29.87 s
Top speed230 km/h210 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

120d F40

7,63kg/hpratio better by 2,17 kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 450 kgmanufacturer kerb weight
DrivetrainTraction
Gearbox8-speed Steptronic transmission
BMW

118d xDrive F20LCI

9,80kg/hp
CharacteristicValueDetail
Power150 hp4 cyl
Torque320 Nm
Weight1 470 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox6-speed manual

The start: 0 to 100 km/h

Off the line, the 120d hits 100 km/h in 7.37 s versus 8.62 s for the 118d xDrive. At this point, the 120d leads by 1.25 s and sits roughly 5 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 120d is doing 121 km/h against 112 km/h for the 118d xDrive. The gap is 0.41 s. The challenger starts to claw back ground.

At 400 metres standing start, the 120d crosses the line in 15.45 s versus 16.28 s. The 0.83 s gap represents roughly 32 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 120d continues to build its lead. At 600 metres, it runs at 167 km/h versus 155 km/h. At 1,000 metres, the 120d finishes in 28.02 s versus 29.87 s, with a 1.84 s lead.

What the numbers don’t tell you

The 118d xDrive features all-wheel drive (AWD) against the 120d’s FWD. 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 120d is capped at 231 km/h, the 118d xDrive at 210 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 (7.63 kg/hp vs 9.80 kg/hp) and transmission (Automatic vs Manual).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 14.20 seconds. The 1.25 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.

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Audi A3 Sportback

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Frequently asked questions

Over 0–100 km/h, 120d F40 wins (7,37 s vs 8,62 s).

120d F40 goes from 0 to 100 km/h in 7,37 seconds (calibrated simulation).

120d F40: 190 hp, ratio 7,63 kg/hp. 118d xDrive F20LCI: 150 hp, ratio 9,80 kg/hp.

120d F40: 230 km/h. 118d xDrive F20LCI: 210 km/h.