Air Density Contemplations

I haven't driven the Landy for weeks. The Mrs uses it for her daily drive and I get out at weekends, but I've been doing a lot of work around the house for weeks now and just not got out in it. Anyway, was hoping for snow this weekend and promised myself a run out in it. Sadly, despite being cold, no snow Still had a run out to the tip with a load of cardboard from radiators I've been fitting. It might be that I haven't driven it for a while or something, but it was pulling really well. Got to wondering if the cold and, therefore, air density had something to do with it. This might indicate my 21yr old intercooler could do with replacement.
It's canny cold, but not sure exactly. However, the fields and trees are white not green and your nostrils look like two ICT chimneys at full belt.
I've done a bit of basic research. At sea level approx air densities are @ 15c 1.225kg/m3, @ 0c it's 1.2922kg/m3 and @ -5 it's 1.3163kg/m3 So, from 15c to zero that's a density increase of 5.5% and from 15c to -5c it's an increase of a little over 7%
Do you think that would be noticeable? Could the freezing air temperature make the Landy feel nippier or, is all that just pants?

Tis true, I've noticed it.
I had a 400cc 2 stroke in the 80's and that would Wheely easily off the throttle in the cold but wouldn't in the warm.

Flossie said:

Tis true, I've noticed it.
I had a 400cc 2 stroke in the 80's and that would Wheely easily off the throttle in the cold but wouldn't in the warm.

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Tremendous She's not quite pulling wheelies, but seems to be livelier.

Air density & ambient temp. has a lot to do with it, that's why modern diesels have intercoolers.
F1 drivers like to clock their practice lap times just before it rains, that way they get the power advantage of denser air whilst still driving a dry track surface.

Air density (or the lack of it) was the reason why engines like the Merlin fitted to the Spitfire had a two stage supercharger.