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AGiuliaPetrolvsB320dHybrid
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsGiulia · 320d

Alfa Romeo Giulia Quadrifoglio vs BMW 320d xDrive G20: 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 · 2016 vs 2020 · Methodology
Alfa RomeoPetrolFaster

Giulia Quadrifoglio

510 hp · 600 Nm · 1,580 kg · 2016

VS
BMWHybrid

320d xDrive G20

190 hp · 400 Nm · 1,620 kg · 2020

Result · 0–100 km/h

AAlfa Romeo Giulia Quadrifoglio

3.94 s

Gap3.02 sin favour of Giulia Quadrifoglio
BBMW 320d xDrive G20

6.96 s

Summary · Caralogy simulation
MeasureGiulia Quadrifoglio320d xDrive G20Gap
0–100 km/h3.94 s6.96 s3.02 s · Giulia Quadrifoglio
400 m standing start11.74 s15.06 s3.32 s · Giulia Quadrifoglio
1,000 m standing start20.93 s27.83 s6.90 s · Giulia Quadrifoglio
Top speed (electronically limited)307 km/h233 km/h74 km/h · Giulia Quadrifoglio
Power-to-weight ratio3.10 kg/hp8.53 kg/hpbetter ratio · Giulia Quadrifoglio

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
BMWHybrid320d xDrive G20
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.
StageGiulia Quadrifoglio320d xDrive G20
0–30 km/h1.19 s · tight gap1.26 s
0–50 km/h1.98 s2.29 s
0–80 km/h3.18 s4.73 s
0–100 km/h3.94 s6.96 s
0–120 km/h4.97 s9.86 s
0–160 km/h7.57 s18.39 s
0–200 km/h11.32 s34.42 s
400 m standing start11.74 s15.06 s
1,000 m standing start20.93 s27.83 s
Top speed307 km/h233 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.

Alfa Romeo

Giulia Quadrifoglio

3,10kg/hpratio better by 5,43 kg/hp
CharacteristicValueDetail
Power510 hpPending
Torque600 Nm
Weight1 580 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed automatic
BMW

320d xDrive G20

8,53kg/hp
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 620 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the Giulia Quadrifoglio hits 100 km/h in 3.94 s versus 6.96 s for the 320d xDrive. At this point, the Giulia Quadrifoglio leads by 3.02 s and sits roughly 10 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Giulia Quadrifoglio is doing 164 km/h against 119 km/h for the 320d xDrive. The gap is 1.83 s. The challenger starts to claw back ground.

At 400 metres standing start, the Giulia Quadrifoglio crosses the line in 11.74 s versus 15.06 s. The 3.32 s gap represents roughly 128 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 165 km/h. At 1,000 metres, the Giulia Quadrifoglio finishes in 20.93 s versus 27.83 s, with a 6.90 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 320d xDrive at 233 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 8.53 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.56 seconds. The 3.02 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, Giulia Quadrifoglio wins (3,94 s vs 6,96 s).

Giulia Quadrifoglio goes from 0 to 100 km/h in 3,94 seconds (calibrated simulation).

Giulia Quadrifoglio: 510 hp, ratio 3,10 kg/hp. 320d xDrive G20: 190 hp, ratio 8,53 kg/hp.

Giulia Quadrifoglio: 307 km/h. 320d xDrive G20: 233 km/h.