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AGiuliaPetrolvsB125dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsGiulia · 125d

Alfa Romeo Giulia Quadrifoglio vs BMW 125d 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.

saloon · 2024 vs 2018
Alfa RomeoPetrolFaster

Giulia Quadrifoglio

510 hp · 600 Nm · 1,580 kg · 2024

VS
BMWDiesel

125d F20LCI

224 hp · 450 Nm · 1,480 kg · 2018

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.

Giulia Quadrifoglio125d F20LCI
0–100 km/h3,93 s−2,55 s6,48 s
400 m standing start11,73 s−2,95 s14,68 s
1,000 m standing start20,92 s−5,48 s26,40 s
Top speed (electronically limited)307 km/h+67 km/h240 km/h
Power-to-weight ratio3,10 kg/hpbetter ratio6,61 kg/hp

Watch the race

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

Alfa RomeoPetrolGiulia Quadrifoglio
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel125d 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. Winner in green.

PalierGiulia Quadrifoglio125d F20LCI
0–30 km/h1,18 s1,88 s
0–50 km/h1,97 s3,03 s
0–80 km/h3,17 s4,83 s
0–100 km/h3,93 s6,48 s
0–120 km/h4,96 s8,57 s
0–160 km/h7,56 s14,58 s
0–200 km/h11,31 s25,23 s
400 m standing start11,73 s14,68 s
1,000 m standing start20,92 s26,40 s
Top speed307 km/h240 km/h

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

Alfa Romeo

Giulia Quadrifoglio

3,10kg/hpratio better by 3,51 kg/hp
CharacteristicValueDetail
Power510 hpPending
Torque600 Nm
Weight1 580 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed automatic
BMW

125d F20LCI

6,61kg/hpcompensated by −100 kg
CharacteristicValueDetail
Power224 hp4 cyl
Torque450 Nm
Weight1 480 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the Giulia Quadrifoglio hits 100 km/h in 3.93 s versus 6.48 s for the 125d. At this point, the Giulia Quadrifoglio leads by 2.55 s and sits roughly 19 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Giulia Quadrifoglio is doing 164 km/h against 130 km/h for the 125d. The gap is 1.92 s. The challenger starts to claw back ground.

At 400 metres standing start, the Giulia Quadrifoglio crosses the line in 11.73 s versus 14.67 s. The 2.95 s gap represents roughly 125 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Giulia Quadrifoglio continues to build its lead. At 600 metres, it runs at 228 km/h versus 180 km/h. At 1,000 metres, the Giulia Quadrifoglio finishes in 20.92 s versus 26.39 s, with a 5.48 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Giulia Quadrifoglio is capped at 307 km/h, the 125d 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 (3.10 kg/hp vs 6.61 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 9.81 seconds. The 2.55 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

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Romeo Giulia Quadrifoglio vs M3 Competition Sedan

BMWVSAudi

125d vs A3 Sportback

Frequently asked questions

Over 0–100 km/h, Giulia Quadrifoglio wins (3,93 s vs 6,48 s).

Giulia Quadrifoglio goes from 0 to 100 km/h in 3,93 seconds (calibrated simulation).

Giulia Quadrifoglio: 510 hp, ratio 3,10 kg/hp. 125d F20LCI: 224 hp, ratio 6,61 kg/hp.

Giulia Quadrifoglio: 307 km/h. 125d F20LCI: 240 km/h.