Land Rover Range Rover
The humble Range Rover holds its value very well. SUVs are generally quite slow at depreciating, and the Range Rover is the best, retaining 65% of its value after three years. This car is functional, fast and luxurious which puts it in high demand. Best not to opt for a high end version as these depreciate faster. You can pick up the most recent Range Rover used for around £60k.
Most sports cars depreciate at an alarming rate, but the Porsche 911 manages to hold its own, achieving 68% value retention after three years. All of Porsche's models have a tendency to hold their value well. Higher end versions like the 911 GT3 RS are in the highest demand and can command a hefty price at auction. Used 911s are available for £15-20k.
Audi's smallest model is also its most in demand, especially the more high spec versions. This is the most affordable of the cars listed here. The A1 retains 62% of its value after three years. For a used Audi A1 you should be expecting about £10k.
This one is probably out of reach for most readers, but there's no problem having aspirations. The wait for a new Aventador is long, and so prices are kept high on the used models, which retain 70% of their value after three years. You'll need to have between £300k and £400k stashed away in order to invest in this asset.
This Mercedes SUV may not be one of the best reviewed cars out there, but it's still a Mercedes which means the badge carries a high degree of desirability. The GLA keeps 63% of its value on average after three years and can be bought used for around £20k.
Another sporty, luxury SUV, this one doesn't quite live up to the standard of the Range Rover, keeping 57% of its value after three years. The hybrid engine is unusual for this kind of car and is likely to keep it in demand amongst the eco-concious for some time yet. You can buy a used one for £30k.