Porsche has revealed the next generation versions of its Boxster and Cayman models.Porsche Boxster 2009

Both were unveiled at the Los Angeles Motor Show and both will go on sale in the UK on February 21.

The Cayman now comes with a 2.9-litre engine which develops 265bhp, an increase of 20bhp over the prior 2.7-litre model.

The Cayman S will come with a 3.4-litre engine and now features direct fuel injection (DFI) which delivers 320bhp, an increase of 25bhp.Porsche Cayman 2009

The 2.9-litre engine in the Boxster develops 255bhp, an increase of 10bhp over the prior 2.7-litre model. The 3.4-litre engine in the Boxster S also features DFI, and delivers 310bhp, up by 15bhp.

Porsche says revisions to the engines means up to 31mpg is possible in the Cayman and Boxster.

Both models are available with the Porsche-Doppelkupplungsgetriebe (PDK) which replaces the former Tiptronic S automatic transmission and will cost £1,961.

The Boxster is priced from £34,420 and the Boxster S priced from £41,250. The Cayman is priced from £36,870 and the Cayman S priced from £45,050.

Each Porsche sale includes a driving experience programme at the new Porsche Driving Experience Centre at Silverstone.