Totally depends on age there.
Stuff like the 5/630i will be quite average on costs, then one day, on schedule, the entire coolant system will turn to dust.
The Civic will probably age more gracefully than a lot of the list, same with the C350 maybe?
A few of these could land you with a massive bill any time they feel like.
I'm not going to put them in any order.
The age of them would all be the same, 3 years~.
I was thinking the Civic Type R would be the cheapest to run, possibly along with the Mondeo 2.5T. Which then made me think would the Focus ST and S2000 be equally as cheap?
why are we not taking into account depreciation?
on probably most cars there it will the single biggest cost?
as said above - 8cyl, 6cyl, 4 cyl will give you a rough idea.
I agree the depreciation on some of these cars will be massive. However it was simply a discussion about running costs. How much money you would need to put aside to comftably run each of these cars. You'll only feel the pain of the depreciation when you come to sell it, not suddenly half way through your ownership like tyres, servicing etc...
I agree going by cyl count gives a rough guide but isn't it likely that an S3 or S2000 would cost more to run than the V8 Mustang?