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A840dDieselvsBGiuliaPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs840d · Giulia

BMW 840d xDrive G15 vs Alfa Romeo Giulia Veloce: 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.

limousine · 2018 vs 2024 · Methodology
BMWDieselFaster

840d xDrive G15

320 hp · 680 Nm · 1,830 kg · 2018

VS
Alfa RomeoPetrol

Giulia Veloce

280 hp · 400 Nm · 1,590 kg · 2024

Result · 0–100 km/h

ABMW 840d xDrive G15

4.96 s

Gap0.29 sin favour of 840d xDrive
BAlfa Romeo Giulia Veloce

5.25 s

Summary · Caralogy simulation
Measure840d xDrive G15Giulia VeloceGap
0–100 km/h4.96 s5.25 s0.29 s · 840d xDrive G15
400 m standing start13.27 s13.56 s0.29 s · 840d xDrive G15
1,000 m standing start24.14 s24.89 s0.75 s · 840d xDrive G15
Top speed (electronically limited)250 km/h240 km/h10 km/h · 840d xDrive G15
Power-to-weight ratio5.72 kg/hp5.68 kg/hpbetter ratio · Giulia Veloce

Watch the race

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

BMWDiesel840d xDrive G15
Speed
0km/h
Timer
0,00s
Distance
0m
Alfa RomeoPetrolGiulia Veloce
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.
Stage840d xDrive G15Giulia Veloce
0–30 km/h1.31 s · tight gap1.41 s
0–50 km/h2.10 s · tight gap2.11 s
0–80 km/h3.58 s · tight gap3.73 s
0–100 km/h4.96 s5.25 s
0–120 km/h6.70 s7.04 s
0–160 km/h11.43 s12.32 s
0–200 km/h18.72 s21.59 s
400 m standing start13.27 s13.56 s
1,000 m standing start24.14 s24.89 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

840d xDrive G15

5,72kg/hpcompensated by −240 kg
CharacteristicValueDetail
Power320 hpPending
Torque680 Nm
Weight1 830 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
GearboxEight-speed Steptronic transmission
Alfa Romeo

Giulia Veloce

5,68kg/hpratio better by 0,04 kg/hp
CharacteristicValueDetail
Power280 hpPending
Torque400 Nm
Weight1 590 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed automatic

The start: 0 to 100 km/h

Off the line, the 840d xDrive hits 100 km/h in 4.96 s versus 5.26 s for the Giulia Veloce. At this point, the 840d xDrive leads by 0.29 s and sits roughly 3 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 840d xDrive is doing 139 km/h against 135 km/h for the Giulia Veloce. The gap is 0.18 s. The challenger starts to claw back ground.

At 400 metres standing start, the 840d xDrive crosses the line in 13.26 s versus 13.56 s. The 0.30 s gap represents roughly 14 m of track - two to three car lengths.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 840d xDrive continues to build its lead. At 600 metres, it runs at 193 km/h versus 186 km/h. At 1,000 metres, the 840d xDrive finishes in 24.13 s versus 24.89 s, with a 0.75 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 840d xDrive is capped at 250 (i.e. 155 mph - industry threshold) km/h, the Giulia Veloce 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 (5.72 kg/hp vs 5.68 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.11 seconds. The 0.29 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, 840d xDrive G15 wins (4,96 s vs 5,25 s).

840d xDrive G15 goes from 0 to 100 km/h in 4,96 seconds (calibrated simulation).

840d xDrive G15: 320 hp, ratio 5,72 kg/hp. Giulia Veloce: 280 hp, ratio 5,68 kg/hp.

840d xDrive G15: 250 km/h. Giulia Veloce: 240 km/h.