Sometimes the heart must rule the head, even if it means more pain further down the road. We'd happily shell out for these motors, even if it meant even more money spent on repair bills.
The Mazda RX-8 aimed to prove there was life in the rotary engine, long after many thought it had breathed its last. Unfortunately, owners soon realised its thirst for oil and petrol was as strong as ever.
When the 1.3-litre engine is healthy, it’s super-smooth. So, too, is the gearbox, which, depending on the version of RX-8 (189bhp or 228bhp) you’re interested in, has five or six speeds.
When buying, look for evidence of servicing and of the coil packs having been changed, and check what oil has been used when topping up. Difficulty starting a warm engine can indicate worn, oil-starved rotor tips. Prices start at £2000, but warranted cars are £4000. Pay it.
2 - TVR Cerbera 4.5 (1996-2003)
It won’t surprise anyone to read that TVRs aren’t the most reliable things on four wheels, with the F1-inspired AJP V8 engines rumoured to go bang on a regular basis. Electrical and trim issues bedevil many cars, but the engines represent buyers’ biggest fear.
If the worst happens, putting one of these high-revving V8s back together is expensive. In truth, if the engine is well maintained, rumours of snapped crankshafts and rebuilds are overplayed.
Assuming we haven’t put you off, the Cerbera is one of the most practical TVRs of all — a genuine four-seater with, when the engine works, lashings of power. Around £20,000 gets you a decent choice of the best available.
3 - Citroën SM (1970-1975)
The DS is revered, rightly, as a technical tour de force and a thing of beauty, but the SM takes things up a notch. It feels far more modern than its 40 years would suggest. As you might expect, however, mixing a highly strung Maserati V6 with cutting-edge 1960s French luxury is a recipe for potentially big bills.
When working, the SM is a thing of joy, but things go wrong with startling regularity. Engines suffer oil pump failure, fuelling problems and timing chain issues. Rust is a major headache, too, and expensive to put right.
There are a few SMs about, so be picky and be prepared to spend north of £25,000 to have any prospect of getting something that won’t break your heart.
4 - Lamborghini Miura (1966-1973)
Is this the original supercar? It certainly introduced the concept of mid-engined layouts to the breed and was Ferruccio Lamborghini’s first project after he got bored with building tractors.
However, to those people who drive Miuras, the car is better known for wandering about and trying to take off at speed. In short, it’s a great car but a difficult mistress. Early ones are underbraked and overpowered. The complex and powerful quad-cam V12 is fed by no fewer than six carburettors. They need constant attention.
Nevertheless, with only about 750 ever made, demand for this temperamental car is strong and its prices high - like £850,000 high.