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A128tiPetrolvsB225dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs128ti · 225d

BMW 128ti F40 vs BMW 225d Convertible F22: 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 · 2020 vs 2018 · Methodology
BMWPetrolFaster

128ti F40

265 hp · 400 Nm · 1,445 kg · 2020

VS
BMWDiesel

225d Convertible F22

224 hp · 450 Nm · 1,625 kg · 2018

Result · 0–100 km/h

ABMW 128ti F40

6.27 s

Gap0.27 sin favour of 128ti
BBMW 225d Convertible F22

6.54 s

Summary · Caralogy simulation
Measure128ti F40225d Convertible F22Gap
0–100 km/h6.27 s6.54 s0.27 s · 128ti F40
400 m standing start14.44 s14.76 s0.32 s · 128ti F40
1,000 m standing start25.87 s26.80 s0.93 s · 128ti F40
Top speed (electronically limited)250 km/h231 km/h19 km/h · 128ti F40
Power-to-weight ratio5.45 kg/hp7.25 kg/hpbetter ratio · 128ti F40

Watch the race

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

BMWPetrol128ti F40
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel225d Convertible F22
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.
Stage128ti F40225d Convertible F22
0–30 km/h1.81 s1.75 s · tight gap
0–50 km/h3.01 s2.84 s
0–80 km/h4.76 s4.75 s · tight gap
0–100 km/h6.27 s6.54 s
0–120 km/h8.20 s8.83 s
0–160 km/h13.63 s15.48 s
0–200 km/h22.97 s27.94 s
400 m standing start14.44 s14.76 s
1,000 m standing start25.87 s26.80 s
Top speed limited250 km/h231 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

128ti F40

5,45kg/hpratio better by 1,80 kg/hp
CharacteristicValueDetail
Power265 hp4 cyl
Torque400 Nm
Weight1 445 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic Sport transmission
BMW

225d Convertible F22

7,25kg/hpcompensated by −180 kg
CharacteristicValueDetail
Power224 hp4 cyl
Torque450 Nm
Weight1 625 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the 128ti hits 100 km/h in 6.27 s versus 6.54 s for the 225d Convertible. Despite the faster sprint time, the 225d Convertible is 1 m further along the track at this moment: stronger low-speed acceleration offsets a slower run beyond 100 km/h.

From 100 km/h to 400 metres

At 200 metres, the 128ti is doing 132 km/h against 127 km/h for the 225d Convertible. The gap is 0.09 s. The challenger starts to claw back ground.

At 400 metres standing start, the 128ti crosses the line in 14.44 s versus 14.76 s. The 0.32 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 128ti continues to build its lead. At 600 metres, it runs at 184 km/h versus 175 km/h. At 1,000 metres, the 128ti finishes in 25.86 s versus 26.79 s, with a 0.93 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 128ti is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 225d Convertible at 231 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 (5.45 kg/hp vs 7.25 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 10.18 seconds. The 0.27 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Other duels you might be interested in

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Frequently asked questions

Over 0–100 km/h, 128ti F40 wins (6,27 s vs 6,54 s).

128ti F40 goes from 0 to 100 km/h in 6,27 seconds (calibrated simulation).

128ti F40: 265 hp, ratio 5,45 kg/hp. 225d Convertible F22: 224 hp, ratio 7,25 kg/hp.

128ti F40: 250 km/h. 225d Convertible F22: 231 km/h.