10. 2014- Audi TT Roadster
Average new price: £36,360
Average new price retained: 45.6 percent
Average depreciation: -£19,780
You might think that 45.6 percent retained value after three years is impressive, but you haven't seen nothing yet. As a starter for 10 the Audi TT is certainly worth considering.
9. 2015- Mazda MX-5
Average new price: £21,260
Average new price retained: 46.2 percent
Average depreciation: -£11,465
The MX-5 might be the cheapest car on our top 10 list, but it's certainly not the worst – leading handling and plenty of fun to be had from this pocket-size convertible.
8. 2008- Aston Martin DB9 Volante
Average new price: £152,887
Average new price retained: 46.6 percent
Average depreciation: -£81,587
With a new price of around £153,000 the DB9 Volante is not only the most expensive car on our list, but with depreciation of nearly £82,000 over three years you could buy every model except our number one. Still, if you've got the cash...
7. 2015- Alfa Romeo 4C Spider
Average new price: £63,265
Average new price retained: 46.6 percent
Average depreciation: -£32,840
You might find yourself accidentally owning a brand new Alfa Romeo 4C – sorry about that – but at least you can rest easy knowing that you'll only be losing 53.4 percent of your £63,000 during the three years you might own the car. Some minor consolation.
6. 2012- Lotus Exige Roadster
Average new price: £58,620
Average new price retained: 48.7 percent
Average depreciation: -£30,095
We might not have seen a proper new Lotus for a long while, but with two models in the top 10 most solid bets the company must be doing something right. The Exige Roadster will keep hold of a decent 48.7 percent of its value.
5. 2014- Alpina 4 Series Convertible
Average new price: £56,170
Average new price retained: 51.4 percent
Average depreciation: -£27,320
Yes, the Alpina is a performance car, but it's here representing the diesel pump – and holds on to more than 51 percent of its value over three years of ownership.
4. 2010- Lotus Elise Series 2
Average new price: £36,220
Average new price retained: 53.0 percent
Average depreciation: -£16,970
When it comes to the most fun convertible out of our 10, the second-generation Lotus Elise is right at the top. It might be getting on a bit, but the Elise still sets the bar for lightness and handling prowess.
3. 2015- Range Rover Evoque Convertible
Average new price: £49,538
Average new price retained: 53.0 percent
Average depreciation: -£23,263
You might not be a paragon of taste if you're driving an Evoque convertible, but no one can fault your finance sense – the Range Rover is a solid performer second hand thanks to its rarity and desirability (in certain areas).
2. 2016- Porsche Boxster
Average new price: £50,236
Average new price retained: 56.1 percent
Average depreciation: -£22,149
Porsche's smallest convertible represents good value with the German carmaker's range and retains an impressive 56 percent of its value over three years. Strangely, though, it's not the best value Porsche to buy when you're looking at depreciation.
1. 2012- Porsche 911 Cabriolet
Average new price: £96,020
Average new price retained: 59.3 percent
Average depreciation: -£39,053
The best buy in the UK is the Porsche 911 (991) Cabriolet which although among the most expensive of our top 10 here at around £96k, will retain a solid 59 percent over three years and 60,000 miles.
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