I wouldnt gamble 100k on a car.
Why not use that as a deposits and buy a few BTL houses/flats? Market is creeping up slowly, so it would be a long term thing. The tenants pay your mortgage on the properties and you make some money back in 10/15 years when you sell them
I hate BTL's and the money making involved around Houses . Houses are homes and many of our children will fail to own their own homes because of it (unless parents stump up large amounts of cash . I believe that house prices are over inflated due to the false demand created by BTL Landlords and also that the stock market is due a correction (because traditional savers in financial institutions have also invested in stocks and shares to get a reasonable return they will want to get out at some stage) and EU problems adding to the problems .... Hence wanting a different way of accumulating a little bit extra ....
There are many cars in this market which are vastly overpriced as can be seen when searching the internet .... I quite like Mercedes SL's from around the 50's ... also some older Porsche's like the 356 . E Types are also a good investment but finding a really good one is a struggle.
I could buy a MK1 Golf as they are an appreciating classic but i need to be putting £50k plus into the car , i don't want 5/6 plus !