Richard, I've just fine tuned your figures.
2 vehicles one a 4x4, the other a comparable saloon car
First car a 2.5 4x4, heavy body, heavy transmission etc = more fuel consumption = higher emissions = higher pollution.=ability to tow large caravan with a safe margin on various surfaces with room for up to 7 passengers.
Second car a 2.5 saloon car, lighter body etc = lower fuel consumption = lower emissions = lower pollution.=rear of car overloaded with noise weight ,clutch burn when reversing twin axle onto pitch, nearer to max tow weight, not much good when it gets a bit muddy.
Let me know how many lines I'm getting.
I must not question teachers beliefs
I must not question teachers beliefs
I must not question teachers beliefs
I must not question teachers beliefs
I must not question teachers beliefs
Brian ;O)