Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Duel
  3. /Estates
A330dDieselvsB420iPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs330d · 420i

BMW 330d Touring G20 vs BMW 420i Convertible G22: 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 · 2019 vs 2021 · Methodology
BMWDieselFaster

330d Touring G20

265 hp · 580 Nm · 1,715 kg · 2019

VS
BMWPetrol

420i Convertible G22

184 hp · 300 Nm · 1,690 kg · 2021

Result · 0–100 km/h

ABMW 330d Touring G20

5.53 s

Gap2.61 sin favour of 330d Touring
BBMW 420i Convertible G22

8.14 s

Summary · Caralogy simulation
Measure330d Touring G20420i Convertible G22Gap
0–100 km/h5.53 s8.14 s2.61 s · 330d Touring G20
400 m standing start13.84 s15.97 s2.13 s · 330d Touring G20
1,000 m standing start25.34 s28.97 s3.63 s · 330d Touring G20
Top speed (electronically limited)250 km/h236 km/h14 km/h · 330d Touring G20
Power-to-weight ratio6.47 kg/hp9.18 kg/hpbetter ratio · 330d Touring G20

Watch the race

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

BMWDiesel330d Touring G20
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol420i Convertible G22
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.
Stage330d Touring G20420i Convertible G22
0–30 km/h1.25 s1.81 s
0–50 km/h2.08 s3.07 s
0–80 km/h3.90 s5.69 s
0–100 km/h5.53 s8.14 s
0–120 km/h7.59 s11.24 s
0–160 km/h13.39 s20.26 s
0–200 km/h22.70 s36.93 s
400 m standing start13.84 s15.97 s
1,000 m standing start25.34 s28.97 s
Top speed limited250 km/h236 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

330d Touring G20

6,47kg/hpratio better by 2,71 kg/hp
CharacteristicValueDetail
Power265 hpPending
Torque580 Nm
Weight1 715 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission
BMW

420i Convertible G22

9,18kg/hp
CharacteristicValueDetail
Power184 hp4 cyl
Torque300 Nm
Weight1 690 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 330d Touring hits 100 km/h in 5.53 s versus 8.14 s for the 420i Convertible. At this point, the 330d Touring leads by 2.61 s and sits roughly 23 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 330d Touring is doing 131 km/h against 115 km/h for the 420i Convertible. The gap is 1.47 s. The challenger starts to claw back ground.

At 400 metres standing start, the 330d Touring crosses the line in 13.83 s versus 15.96 s. The 2.13 s gap represents roughly 82 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 330d Touring continues to build its lead. At 600 metres, it runs at 182 km/h versus 161 km/h. At 1,000 metres, the 330d Touring finishes in 25.34 s versus 28.97 s, with a 3.63 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 236 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 330d Touring is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 420i Convertible at 236 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 (6.47 kg/hp vs 9.18 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 13.10 seconds. The 2.61 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 330d Touring G20
Audi A5 Avant TFSI quattro S tronic 150 kWAudi A5 AvantAudi A5 Avant

Other duels you might be interested in

BMWVSAudi

330d Touring vs A5 Avant

AudiVSBMW

A4 40 TFSI vs 420i Convertible

BMWVSAudi

330d Touring vs A5 Sedan

AudiVSBMW

A5 Avant vs 420i Convertible

Frequently asked questions

Over 0–100 km/h, 330d Touring G20 wins (5,53 s vs 8,14 s).

330d Touring G20 goes from 0 to 100 km/h in 5,53 seconds (calibrated simulation).

330d Touring G20: 265 hp, ratio 6,47 kg/hp. 420i Convertible G22: 184 hp, ratio 9,18 kg/hp.

330d Touring G20: 250 km/h. 420i Convertible G22: 236 km/h.