The Mustang’s performance in this area very much depends on how you look at it. On the one hand, a European coupe of this size, with this much power, will cost you many, many more thousands to buy, making the Mustang look like something of a bargain. And, while depreciation on the Ford is heavier in percentage terms, the overall amount you’ll lose is lessened hugely by the lower purchase price, so on that score, you won’t be any more out of pocket after your average three-year ownership period. However, even the smaller-engined version isn't spectacular when it comes to fuel economy, while the V8 is thirsty by any standard. Tax bills will also be hefty due to the correspondingly sky-high CO2 emissions, and bills for insurance, maintenance and tyres will also be very steep. That said, a Mustang is never going to be a rational purchase anyway.