Mike-I never claimed the power was free. You have to burn more fuel! Most people get poorer economy in cold weather than the summer.

The difference in calorific value between summer and winter fuel isn't as big as people think.

The colder temperatures have a negative impact on friction throughout the car,

??

Not once the engine and gearbox are up to operating temperature.

Also colder air within an engine cylinder requires more heat energy to heat it up which then draws energy away from the amount of energy actually transmitted onto the road and hence motion

???

Don't actually understand what this paragraph is trying to say!

Yes, you've got more ponies to play with. But I'm enjoying my extra 'free' ones!

Yes.

But I thought you had too much to begin with!

The Berlingslow felt a little peppier once it had warmed up.

But as diesels are indeed 'unthrottled' someone will probably tell me it was in my head...

It pushes your economy down-but your acceleration should be a little sharper. I find mine noticeably better. Went for a hard run to celebrate!

I'm with "Red&Bold".

My car is a naturally aspirated 2.0 petrol

Since the winter, acceleration has been sluggish whilst accelerating up a slight incline; even with a warm engine (driving 9-10 miles previously)

It's much more 'peppy' in the summer