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. /Sports Cars
A230iPetrolvsB120dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs230i · 120d

BMW 230i Convertible F44 vs BMW 120d 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 · 2021 vs 2018 · Methodology
BMWPetrolFaster

230i Convertible F44

252 hp · 350 Nm · 1,610 kg · 2021

VS
BMWDiesel

120d F20LCI

190 hp · 400 Nm · 1,415 kg · 2018

Result · 0–100 km/h

ABMW 230i Convertible F44

5.84 s

Gap1.31 sin favour of 230i Convertible
BBMW 120d F20LCI

7.15 s

Summary · Caralogy simulation
Measure230i Convertible F44120d F20LCIGap
0–100 km/h5.84 s7.15 s1.31 s · 230i Convertible F44
400 m standing start14.08 s15.30 s1.22 s · 230i Convertible F44
1,000 m standing start25.81 s27.54 s1.73 s · 230i Convertible F44
Top speed (electronically limited)249 km/h228 km/h21 km/h · 230i Convertible F44
Power-to-weight ratio6.39 kg/hp7.45 kg/hpbetter ratio · 230i Convertible F44

Watch the race

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

BMWPetrol230i Convertible F44
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel120d 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.
Stage230i Convertible F44120d F20LCI
0–30 km/h1.30 s2.05 s
0–50 km/h2.18 s3.27 s
0–80 km/h4.07 s5.29 s
0–100 km/h5.84 s7.15 s
0–120 km/h7.98 s9.55 s
0–160 km/h14.06 s16.63 s
0–200 km/h24.59 s30.38 s
400 m standing start14.08 s15.30 s
1,000 m standing start25.81 s27.54 s
Top speed249 km/h228 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

230i Convertible F44

6,39kg/hpratio better by 1,06 kg/hp
CharacteristicValueDetail
Power252 hp4 cyl
Torque350 Nm
Weight1 610 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic Sport transmission
BMW

120d F20LCI

7,45kg/hpcompensated by −195 kg
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 415 kgmanufacturer kerb weight
Drivetrain-
Gearbox6-speed manual (8-speed Steptronic)

The start: 0 to 100 km/h

Off the line, the 230i Convertible hits 100 km/h in 5.84 s versus 7.15 s for the 120d. At this point, the 230i Convertible leads by 1.31 s and sits roughly 23 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 230i Convertible is doing 129 km/h against 124 km/h for the 120d. The gap is 1.03 s. The challenger starts to claw back ground.

At 400 metres standing start, the 230i Convertible crosses the line in 14.08 s versus 15.30 s. The 1.22 s gap represents roughly 51 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 230i Convertible continues to build its lead. At 600 metres, it runs at 179 km/h versus 172 km/h. At 1,000 metres, the 230i Convertible finishes in 25.81 s versus 27.53 s, with a 1.72 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 230i Convertible is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 120d at 228 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 (6.39 kg/hp vs 7.45 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.99 seconds. The 1.31 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 120d F20LCI
Audi A3 allstreetAudi A3 Sportback TFSI quattro S tronic 150 kW

Other duels you might be interested in

BMWVSAudi

230i Convertible vs A3 allstreet

BMWVSAudi

120d vs A3 Sedan

BMWVSAudi

230i Convertible vs A3 Sedan

BMWVSAudi

120d vs A3 Sportback

Frequently asked questions

Over 0–100 km/h, 230i Convertible F44 wins (5,84 s vs 7,15 s).

230i Convertible F44 goes from 0 to 100 km/h in 5,84 seconds (calibrated simulation).

230i Convertible F44: 252 hp, ratio 6,39 kg/hp. 120d F20LCI: 190 hp, ratio 7,45 kg/hp.

230i Convertible F44: 249 km/h. 120d F20LCI: 228 km/h.