BMW M5 vs Porsche Cayenne

SpecBMW M52024Porsche Cayenne2024
Price (OTR)£115,895£89,900
Power625 bhp474 bhp
Torque750 Nm600 Nm
0–60 mph3 secs4.4 secs
Top Speed155 mph164 mph
MPG (combined)25.4 mpg26.4 mpg
CO₂252 g/km242 g/km
Boot Space530 litres772 litres
Kerb Weight1950 kg2055 kg
Engine4.4L2.9L
Transmission8-speed Auto8-speed Tiptronic
DrivetrainAWDAWD
Insurance Group5047
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 M5Porsche Cayenne
Fuel / energy£7,625£7,336
Road tax (VED)£570£570
Insurance (est.)£7,200£6,831
Depreciation (est.)£46,358£35,960
Total cost£61,753£50,697
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.