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Yes that's true, but more so in terms of overall power, generally i've found though that initial throttle response is generally sharper in a petrol.
I'm no expert by any means but I have looked into this a 'little' bit and you're probably right in general terms but its still not the case with all cars..
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However, all this talk of money means little if the diesel isn't any good. Lets go back to the facts and figures again - Power on the 2.7 D is 207bhp, versus the 240bhp of the petrol, but hang on, the important figure comes next - Torque is a massive 320 lb/ft on the diesel, whereas the petrol comes in at 216 lb/ft, meaning that the diesel has a lot more shove. We're getting a bit anoraky here, but the revs that the maximum torque is developed at also play a big part, with the diesel producing maximum torque at 1900 rpm, compared to the petrol's 4100 revs, meaning that you don't need to rev the diesel XF anywhere nearly as hard to get the car really moving. Acceleration figures also back this up, with the diesel posting a 7.7 second 0-60mph time, and the petrol coming in behind the diesel at 7.9 seconds, despite the extra power.
Quoted from here...