The Kindle Fire HD comes in two options: either with a 7in (17.8cm) screen or an 8.9in (22.6cm) one. That pitches the latter directly against Apple's slightly larger iPad, the bestselling tablet on the market.
A third device upgrades its original model and cuts its price.
Amazon said the first Kindle Fire had captured 22% of the US tablet market - the only country it was sold in.
The 7in Kindle Fire HD with 16 gigabytes of storage will cost £159 in the UK, and the lower-end Kindle Fire £129. Both will be available for delivery from 25 October.
By contrast the iPad 2 is sold for £329; the Google Nexus 7 and Samsung Galaxy Tab2 7 for £199; and the Kobo Arc tablet for £189. The 8.9in Kindle Fire HD is only being released in the US at this time, where it will become available in November. Amazon's share price closed 2% higher.
Source: BBC News
