Porsche has confirmed the launch of three new models ahead of its appearance at next week’s Detroit Auto Show.

Visitors to the show will see the 911 Cabrio for the first time. It will hit showrooms a few months after the Coupé variant of the 911 goes on sale in February.

Pricing is unannounced, but the vehicle is believed to boast a 3.8-liter V6 engine producing 294kW of power, with a seven-speed automatic transmission.

The US is Porsche’s biggest market for drop-top 911s, and despite the economic uncertainty, American luxury-lovers are still buying the automaker’s high-priced models — sales are expected to push past 30,000 this year from 29,000 in 2011.

That healthy sales growth will no doubt be helped by excitement over two other models confirmed by Porsche January 4, both of which are eagerly awaited by fans.

The first, a diesel version of the Cayenne, will see yet another version of Porsche’s best-selling model become available later this year, the first compression-ignition car to be offered by Porsche on the continent.

A long-awaited compact SUV, the Porsche Cajun, will then launch in 2013, Porsche said, taking on other luxury offroaders such as the BMW X3.