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Home›Duel›Audi A8 vs BMW 840d

Performance comparison

Audi A8 L 55 TFSI quattro tiptronic 250 kW MHEV vs BMW 840d xDrive G15: 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.

AudiHybrid

A8 L 55 TFSI quattro tiptronic 250 kW MHEV

340 hp · 500 Nm · 1,980 kg · 2025

VS
BMWHybridFaster

840d xDrive G15

340 hp · 700 Nm · 1,915 kg · 2020

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO

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.

A8 L 55 TFSI quattro tiptronic 250 kW MHEV840d xDrive G15
0–100 km/h5,74 s4,72 s+1,02 s
400 m standing start13,93 s13,00 s+0,93 s
1,000 m standing start24,99 s23,70 s+1,29 s
Top speed (electronically limited)250 km/h250 km/h
Power-to-weight ratio5,82 kg/hp5,63 kg/hpbetter ratio

Watch the race

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

AudiHybridA8 L 55 TFSI quattro tiptronic 250 kW MHEV
Speed
0km/h
Timer
0,00s
Distance
0m
BMWHybrid840d xDrive G15
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. Winner in green.

PalierA8 L 55 TFSI quattro tiptronic 250 kW MHEV840d xDrive G15
0–30 km/h1,56 s1,18 s
0–50 km/h2,59 s1,94 s
0–80 km/h4,25 s3,40 s
0–100 km/h5,74 s4,72 s
0–120 km/h7,57 s6,36 s
0–160 km/h12,60 s10,86 s
0–200 km/h20,27 s17,63 s
400 m standing start13,93 s13,00 s
1,000 m standing start24,99 s23,70 s
Top speed limited250 km/h250 km/h

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

Audi

A8 L 55 TFSI quattro tiptronic 250 kW MHEV

5,82kg/hpcompensated by −65 kg
CharacteristicValueDetail
Power340 hpPending
Torque500 Nm
Weight1 980 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed tiptronic
BMW

840d xDrive G15

5,63kg/hpratio better by 0,19 kg/hp
CharacteristicValueDetail
Power340 hp6 cyl
Torque700 Nm
Weight1 915 kgmanufacturer kerb weight
DrivetrainIntegrale (AWD)
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the Bmw 840d xDrive hits 100 km/h in 4.72 s versus 5.74 s for the A8 L 55 TFSI quattro tiptronic 250 kW MHEV. At this point, the Bmw 840d xDrive leads by 1.02 s and sits roughly 14 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Bmw 840d xDrive is doing 141 km/h against 135 km/h for the A8 L 55 TFSI quattro tiptronic 250 kW MHEV. The gap is 0.75 s. The challenger starts to claw back ground.

At 400 metres standing start, the Bmw 840d xDrive crosses the line in 13.00 s versus 13.93 s. The 0.93 s gap represents roughly 43 m of track — a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Bmw 840d xDrive continues to build its lead. At 600 metres, it runs at 196 km/h versus 190 km/h. At 1,000 metres, the Bmw 840d xDrive finishes in 23.69 s versus 24.99 s, with a 1.30 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph — industry threshold) vs 250 (i.e. 155 mph — industry threshold) km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals share the same electronic speed cap: the A8 L 55 TFSI quattro tiptronic 250 kW MHEV and the Bmw 840d xDrive are governed to 250 (i.e. 155 mph — industry threshold) km/h. At that speed, standard-fit tyres approach their safety threshold — an industrial ceiling common to most electric vehicles in this segment. Neither car shows its true aerodynamic potential in this duel.

With two combustion powertrains, the difference comes down to power-to-weight ratio (5.82 kg/hp vs 5.63 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.65 seconds. The 1.02 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 A8 L 55 TFSI quattro tiptronic 250 kW MHEV
Volvo XC40 Recharge Twin AWDBmw M340i xDriveMercedes S 450 4MATIC Limousine
Instead of 840d xDrive G15
Bmw 840d xDrive Gran CoupeBmw M440i Gran CoupéBmw 840d xDrive Gran Coupe

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AudiVSBmw

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BmwVSVolvo

840d xDrive vs XC40 B4

Frequently asked questions

Sur 0–100 km/h, 840d xDrive G15 gagne (4,72 s vs 5,74 s).

A8 L 55 TFSI quattro tiptronic 250 kW MHEV passe de 0 à 100 km/h en 5,74 secondes (simulation calibrée).

A8 L 55 TFSI quattro tiptronic 250 kW MHEV : 340 hp, ratio 5,82 kg/hp. 840d xDrive G15 : 340 hp, ratio 5,63 kg/hp.

A8 L 55 TFSI quattro tiptronic 250 kW MHEV : 250 km/h. 840d xDrive G15 : 250 km/h.