The TwinTop 1.6 pack includes an upgrade from fixed to automatic pop-up roll over bars. Early buyers will also be offered 16-inch alloys for no extra cost.
Sport models gain the pop-up roof bars, along with 17-inch twin spoke alloys. The Design trim will get an upgrade to 18-inch alloy wheels and a CD auto changer.
Prices for the Astra TwinTop start at £16,995 and it goes on sale in May.