BMW M5 vs Audi RS Q8

SpecBMW M52023Audi RS Q82024
Price (OTR)£112,435£117,685
Power625 bhp600 bhp
Torque750 Nm800 Nm
0–60 mph3 secs3.8 secs
Top Speed155 mph155 mph
MPG (combined)25.4 mpg22.4 mpg
CO₂252 g/km286 g/km
Boot Space530 litres605 litres
Kerb Weight1945 kg2315 kg
Engine4.4L4.0L
Transmission8-speed Auto8-speed Tiptronic
DrivetrainAWDAWD
Insurance Group5050
Annual Tax£190£190
Euro NCAP5 / 5 stars5 / 5 stars
Seats55
Fuel TypePetrolPetrol

Running Costs Calculator

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

Over 3 yearsBMW M5Audi RS Q8
Fuel / energy£7,625£8,646
Road tax (VED)£570£570
Insurance (est.)£7,200£7,200
Depreciation (est.)£44,974£47,074
Total cost£60,369£63,490
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.