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
A840iPetrolvsB318dHybrid
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs840i · 318d

BMW 840i G15 vs BMW 318d Steptronic F30: 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 · 2020 vs 2018 · Methodology
BMWPetrolFaster

840i G15

333 hp · 500 Nm · 1,730 kg · 2020

VS
BMWHybrid

318d Steptronic F30

148 hp · 320 Nm · 1,430 kg · 2018

Result · 0–100 km/h

ABMW 840i G15

5.14 s

Gap4.18 sin favour of 840i
BBMW 318d Steptronic F30

9.32 s

Summary · Caralogy simulation
Measure840i G15318d Steptronic F30Gap
0–100 km/h5.14 s9.32 s4.18 s · 840i G15
400 m standing start13.36 s16.92 s3.56 s · 840i G15
1,000 m standing start24.12 s30.62 s6.50 s · 840i G15
Top speed (electronically limited)250 km/h211 km/h39 km/h · 840i G15
Power-to-weight ratio5.20 kg/hp9.66 kg/hpbetter ratio · 840i G15

Watch the race

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

BMWPetrol840i G15
Speed
0km/h
Timer
0,00s
Distance
0m
BMWHybrid318d Steptronic F30
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.
Stage840i G15318d Steptronic F30
0–30 km/h1.37 s2.29 s
0–50 km/h2.29 s3.72 s
0–80 km/h3.77 s6.62 s
0–100 km/h5.14 s9.32 s
0–120 km/h6.79 s12.90 s
0–160 km/h11.35 s24.27 s
0–200 km/h18.29 s55.83 s
400 m standing start13.36 s16.92 s
1,000 m standing start24.12 s30.62 s
Top speed limited250 km/h211 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

840i G15

5,20kg/hpratio better by 4,47 kg/hp
CharacteristicValueDetail
Power333 hp6 cyl
Torque500 Nm
Weight1 730 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic
BMW

318d Steptronic F30

9,66kg/hpcompensated by −300 kg
CharacteristicValueDetail
Power148 hpPending
Torque320 Nm
Weight1 430 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 840i hits 100 km/h in 5.14 s versus 9.32 s for the 318d Steptronic. At this point, the 840i leads by 4.18 s and sits roughly 29 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 840i is doing 140 km/h against 111 km/h for the 318d Steptronic. The gap is 2.37 s. The challenger starts to claw back ground.

At 400 metres standing start, the 840i crosses the line in 13.35 s versus 16.91 s. The 3.56 s gap represents roughly 129 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 840i continues to build its lead. At 600 metres, it runs at 195 km/h versus 153 km/h. At 1,000 metres, the 840i finishes in 24.12 s versus 30.62 s, with a 6.50 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 840i is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 318d Steptronic at 212 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 (5.20 kg/hp vs 9.66 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 15.08 seconds. The 4.18 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Other duels you might be interested in

PorscheVSBMW

Panamera vs 840i

AudiVSBMW

A4 40 TDI vs 318d Steptronic

BMWVSPorsche

840i vs Panamera 4

VolvoVSBMW

S60 B4 vs 318d Steptronic

Frequently asked questions

Over 0–100 km/h, 840i G15 wins (5,14 s vs 9,32 s).

840i G15 goes from 0 to 100 km/h in 5,14 seconds (calibrated simulation).

840i G15: 333 hp, ratio 5,20 kg/hp. 318d Steptronic F30: 148 hp, ratio 9,66 kg/hp.

840i G15: 250 km/h. 318d Steptronic F30: 211 km/h.