Quote:
Originally Posted by Fraser
I don't fully agree. Overcoming a vehicle's inertia (due to its mass) and its aerodynamic drag are the two biggest factors in fuel consumption. The inertia factor comes into play in stop-start driving while the aero issue is more important at higher speeds. Now you drive (ie. lead foot verses feather foot) is also a major factor, as is your driving environment, ie. city or country, flat or hilly etc. Then there's the other issues like rolling resistance (tyres and tyre pressures), efficiency losses in the drivetrain, etc.
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While I'm inclined to agree, i believe my statement was assuming that you've already chosen your vehicle. Such as an X5. It's no Jaguar E-Type but for any of us comparing our numbers, the aerodynamics of an E53 is a wash as that is a constant. The variables are more what I was alluding to.