8 (Tie). BMW i8 Roadster
After years of rumors, BMW finally took the top off the i8 for the new Roadster. It features a retractable hardtop that stows behind the driver in 15 seconds.
7 (Tie). Aston Martin DB11 Volante
The Aston Martin DB11 Volante is a recent entry to the luxury droptop segment, and it features quite a quick roof mechanism that requires 14 seconds to open and 16 seconds to close.
The top is available in bordeaux red, black, silver, or grey silver. Inside, there's an Alcantara headliner.
7 (Tie). Ferrari Portofino
There's a tie for ninth place on this list with two models that require 14 seconds to lower the roof.
The Ferrari Portofino features a retractable hardtop that makes it look like a coupe when in place but can quickly allow for open-roof motoring.
6. Mazda MX-5 RF
While a folding time of 13 seconds only puts the Mazda MX-5 Miata RF into the middle of the pack on this list, the figure is still quite impressive because it gives the convertible the quickest folding hardtop on this list – not a bad attribute for such a relatively affordable vehicle.
4 (Tie). Audi TT Roadster
The current Audi TT is nearing retirement, and there might not be a replacement for the convertible on the way. However, the roadster continues to offer one with the quicker power-folding tops on the market with just 10 seconds to stow the roof in the back.
4 (Tie). BMW Z4
The new BMW Z4 is a speedy roadster with a quick-opening roof.
3. Porsche 718 Boxster
The Porsche 718 Boxster is a quick sports car in a straight line, and it has a speedy roof, too. Occupants only need to wait nine seconds for the top to either open or close.
2. Ford Mustang Convertible
The 2018 Ford Mustang Convertible offers nearly the quickest power-folding roof on the market by opening in a mere seven seconds and closing in nine seconds. It beats droptops that cost significantly more like the F-Type and DB11 Volante. The next one is a quite a bit more expensive, though.
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