BMW M3 vs Audi A8

SpecBMW M32024Audi A82023
Price (OTR)£79,835£100,285
Power510 bhp462 bhp
Torque650 Nm700 Nm
0–60 mph3.5 secs4.7 secs
Top Speed155 mph155 mph
MPG (combined)29.1 mpg113 mpg
CO₂220 g/km56 g/km
Boot Space480 litres505 litres
Kerb Weight1730 kg2290 kg
Engine3.0L3.0L
Transmission8-speed Auto8-speed Tiptronic
DrivetrainRWDAWD
Insurance Group5046
Annual Tax£190£190
Euro NCAP5 / 5 stars5 / 5 stars
Seats55
Fuel TypePetrolPetrol Hybrid

Running Costs Calculator

Adjust the inputs to estimate what each car will cost you to own.

Over 3 yearsBMW M3Audi A8
Fuel / energy£6,655£1,714
Road tax (VED)£570£570
Insurance (est.)£7,200£6,708
Depreciation (est.)£31,934£40,114
Total cost£46,359£49,106
How these numbers are calculated
  • Fuel cost uses the car's combined MPG and the price you enter.
  • EV energy cost assumes 3.5 mi/kWh (UK average). Real efficiency varies by car and driving style.
  • Insurance is a rough estimate based on the car's insurance group — your actual quote depends on age, location, and history.
  • Depreciation assumes 40% loss over 3 years, scaled linearly. Premium brands and EVs can deviate significantly.
  • Road tax uses the published first-year and standard VED for the car's CO₂ band.