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A120iPetrolvsB118dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs120i · 118d

BMW 120i F20LCI 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 · 2018 vs 2018 · Methodology
BMWPetrolFaster

120i F20LCI

184 hp · 270 Nm · 1,375 kg · 2018

VS
BMWDiesel

118d xDrive F20LCI

150 hp · 320 Nm · 1,470 kg · 2018

Result · 0–100 km/h

ABMW 120i F20LCI

7.12 s

Gap1.50 sin favour of 120i
BBMW 118d xDrive F20LCI

8.62 s

Summary · Caralogy simulation
Measure120i F20LCI118d xDrive F20LCIGap
0–100 km/h7.12 s8.62 s1.50 s · 120i F20LCI
400 m standing start15.22 s16.29 s1.07 s · 120i F20LCI
1,000 m standing start27.53 s29.87 s2.34 s · 120i F20LCI
Top speed (electronically limited)225 km/h210 km/h15 km/h · 120i F20LCI
Power-to-weight ratio7.47 kg/hp9.80 kg/hpbetter ratio · 120i F20LCI

Watch the race

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

BMWPetrol120i F20LCI
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.
Stage120i F20LCI118d xDrive F20LCI
0–30 km/h1.79 s · tight gap1.80 s
0–50 km/h2.99 s · tight gap3.05 s
0–80 km/h5.16 s5.89 s
0–100 km/h7.12 s8.62 s
0–120 km/h9.70 s12.06 s
0–160 km/h16.79 s23.03 s
0–200 km/h29.61 s52.90 s
400 m standing start15.22 s16.29 s
1,000 m standing start27.53 s29.87 s
Top speed225 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

120i F20LCI

7,47kg/hpratio better by 2,33 kg/hp
CharacteristicValueDetail
Power184 hp4 cyl
Torque270 Nm
Weight1 375 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic
BMW

118d xDrive F20LCI

9,80kg/hpcompensated by −95 kg
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 120i hits 100 km/h in 7.12 s versus 8.62 s for the 118d xDrive. At this point, the 120i leads by 1.50 s and sits roughly 7 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 120i is doing 122 km/h against 112 km/h for the 118d xDrive. The gap is 0.57 s. The challenger starts to claw back ground.

At 400 metres standing start, the 120i crosses the line in 15.22 s versus 16.28 s. The 1.06 s gap represents roughly 40 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 120i continues to build its lead. At 600 metres, it runs at 170 km/h versus 155 km/h. At 1,000 metres, the 120i finishes in 27.52 s versus 29.87 s, with a 2.34 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 120i is capped at 225 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 (7.47 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 1.50 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 118d xDrive F20LCI
Audi A3 allstreet

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Frequently asked questions

Over 0–100 km/h, 120i F20LCI wins (7,12 s vs 8,62 s).

120i F20LCI goes from 0 to 100 km/h in 7,12 seconds (calibrated simulation).

120i F20LCI: 184 hp, ratio 7,47 kg/hp. 118d xDrive F20LCI: 150 hp, ratio 9,80 kg/hp.

120i F20LCI: 225 km/h. 118d xDrive F20LCI: 210 km/h.