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A lot of people just leave their summer tyres on all year - we don't tend to get enough inclement weather for it to make a huge difference. I prefer all-season tyres though. You can still swap to winter tyres if you want - this has been becoming more popular over the last few years. Check with your insurance company first though, as apparently some have ...


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Because there are a variety of weather conditions in the UK, it would be a good investment to get all-season tires. It may not snow much, but it gets a fair amount of rain. Wet cold roads can be treacherous too, so better to be prepared. All-season tires will provide good traction in a multitude of conditions.


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There's another factor regarding humidity which is that water air expands/collapses per degree of temperature change a hugely, so its presence in the combustion chamber increases the pressure of the explosion. A friend of mine experimented with a water injection system on his (carburettor) car while studying for an engineering degree. He reported better ...


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tl;dr: Cold dry air has a substantial effect on horsepower. This can be confirmed through experimentation on any modern car. I can think of two scientific reasons as to why this may be: Increased air density Decreased humidity Yes and yes. You're already most of the way there. Let's take a quick trip to simplified theoretical model ...


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You are absolutely right. I remember a few years ago a Formula 1 commentator mentioned that the cold conditions in the morning is why the drivers were seeing their lap times had improved by as much as 1 second, which is a lot in Formula 1. Also, an intercooler cools air down to make it more dense, which in turn makes more power, so obviously your theory is ...



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