Have no issues with it here...drives as expected. My favorite car is the McLaren F1, so taming the F40 felt very similiar, as it is with these 90's supercars.
Have no issues with it here...drives as expected. My favorite car is the McLaren F1, so taming the F40 felt very similar. I, too, have driven in the Swedish winter. In fact, I was born and raised in Sweden (Hence my name) so I can vouch for the more difficult driving conditions. I think if people are constantly telling you "Oh that's just how difficult the car is to drive" then we aren't really helping you solve the issue. There are many other cars that require a great deal of skill, too. Have you encountered this oversteer issue with any other car?
The F40 is well known for its turbo lag, so you MUST be careful when giving it a bootfull. Learn to exercise the power accordingly and stay away from spooling those bad boys up and unleashing hell in one instance. When you put your foot down in the real F40, you'll have to give it some time as the lag is horrible (I've witnessed it first hand, but wasn't behind the wheel) so don't expect wonders right away. "Look honey, I'm beating a Ferrari!" was a common joke back when the car came out due to the lag being so aggressive that you could "beat a Ferrari" in acceleration. Once the power is unleashed, however, it's a sudden explosion of excitement as the car transforms into a V2 rocket and pushes your inner organs to your spine. That's when you might break loose the rear. Play around with the anti-roll bars, stiffen the front up a bit, the brake bias, weight balance, and tailor the gear ratios to your liking. See if it helps.
Cheers!