One car starts with clutch only, the other doesn't?

My dad's car is a Ford Mondeo mk3 2.0 Tddi Diesel. In this car it's quite easy to take off with relasing the clutch only. My car is a Skoda Fabia 1.8 Petrol it's impossible to take off like that. I have to accelerate to at least 2500 rpm. Why is this?

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