Honestly, and this is just me not minding my own business looking out, but if I were you I'd keep the Corsa. Despite the allure of classic car ownership there's something to be said about turning the key on a nearly new car with plenty of warranty without worrying about if it'll start or what will break.
Yes the finance payments might be annoying but if you keep it for a bit you may be able to refinance later with a better rate and lower payment, you'll keep the miles low on on the Dolomite, and have a known reliable form of transportation if something goes wrong with the Dolomite.
Well, to fully understand my situation you must first understand Vauxhall ownership.
They devalue in a terrifying fashion, it has another year of warranty left and then the value will drop significantly on top of the regular depreciation. Admittedly I only intended to keep it for as long as the warranty lasted in the first place, but I find the car dull and it's potential for costing money is scary. I spent more on ONE wheel and a tyre than I did getting all the work done to MOT the 1300 and Yaris combined.
To be honest, at the moment, I'm feeling that the Corsa isn't worth what I'm paying for it. I've only done 30 miles in it in over a fortnight and it eats up a week's wages every month just for the privilege of me owning it.
Granted it's reliable, and a bit more economical and a fair bit faster than the 1850, but it costs me so much in finance that if it was gone and the 1850s gearbox dies I could buy a entirely reconditioned one for not much more than a monthly payment... I could buy a new clutch for less, or some welding to the floorpan or something. Not only that but if push comes to shove and I really am strapped for cash I can change the gearbox/clutch or most mechanical gubbins myself... There also isn't much you can't buy for them, aside from trim pieces and some rubber bits (quarterlight seals dammit!).
The Dolly 1300 is a very original car, from what I can tell it had one owner until about 2004 and very few parts have been replaced. It MIGHT genuinely only have done 24,000 miles but been horrifically maintained in the last 8 years, as a result the mechanical side of things is bad, age related failings and poor maintenance taking it's toll. An engine rebuild would solve 85% of it's currently problems (it currently uses more oil per 100 miles than the 1850 uses in 500+).
The 1850 on the other hand isn't a very original car, it's had at least 37 billion owners, it's had much more welding done, the paint is shit and the 84,000 miles is clearly genuine. BUT, loads of replacement bits (stainless exhaust with lifetime warranty, hoses, radiator, air filters, water pump) plenty of modern additions (electric fan, electric ignition etc. The engine pulls well (the brakes pull to the right and squeal like a pig but that's fiiiiiine), the clutch and gearbox are perfectly usable if showing their age, not MUCH water gets into the cabin, the heater is fantastic and from what I can tell it's getting 35mpg+.
Also, and most importantly, the wedge of history from the 90s I have shows its been looked after even when it was just an old banger, after that it was laid up for a while and judging by the modern additions it looks like it's been brought up to a very usable standard over the last few years. No suspect noises from the bottom end of the engine, perhaps a bit of a rattle from the top end which I suspect is the rocker gear. Hell, the only thing I've found that doesn't work is the radio...
But, as I said, the 1850 has until January to prove itself reliable or otherwise. I reckon throwing it in to use as a daily driver in freezing conditions, salt covered roads and gale force winds while being kept on a public street should be a good test of whether it can hack it. If it can I'd happily spend the money I save from not paying for, insuring or taxing the Corsa on running the 1850.
It's funny people always wonder how I can afford 3 cars on my wage, it's 'cause cars are my sole hobby. I know people who spend masses of money on being a member of a golf club, or buying gaming PCs/consoles, many spend ?40-?70 every weekend just on booze. Me? I have my cars.
Anyways, it could turn out that the 1850 decides it isn't going to play ball, the rather whiney gearbox might explode or the timing chain might jump. Who knows? Will have to see.