• Porsche 911 (pre-1974, series 901)

    It’s the non-impact-bumper cars made up to August 1973 that still outstrip other 911s both in value and appeal. Porsche specialist Paul Stephens points out the biggest restoration issue. 'They all have so much in common, structurally and mechanically, that a full restoration on the cheapest 911T costs about the same as that on a Carrera RS, but the 911T will never recoup the cost of having this done. However, there are lots of cars around - probably more early Porsche 911s survive than Mkl Ford Escorts - so you should be able to find one that has survived well and which can be brought up to standard with some sensitive refurbishment. The three things that influence value are originality - including matching numbers - provenance and the quality of any restoration work that has been carried out.’

    Stephens says a full restoration can easily exceed £100k, but suggests that for most models away from the RS and S variants or highly sought-after 1964 cars, it's better to find a good original example in need of nothing more than light restoration. Spend £30k to £40k, then budget perhaps half as much again to preserve and improve it.

    If originality isn’t an overriding concern, you can give an older car more modern performance, or a more modern 911 an older look.
    'These are very adaptable cars,’ says Stephens. 'And Porsche is working hard to support the older models.’