The Saturn Sky was the only roadster

Roadster

A roadster is a two-seat open car with emphasis on sporty handling and without a fixed roof or side weather protection. Strictly speaking a roadster with wind-up windows is a convertible but as true roadsters are no longer made the distinction is now irrelevant...

 from the Saturn marque of American automaker General Motors

General Motors

General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...

, and was initially released in the first quarter of 2006 as a 2007 model. It uses the Kappa

GM Kappa platform

Kappa was General Motors' subcompact rear-wheel drive automobile platform for roadster applications. The architecture debuted in the 2006 Pontiac Solstice and 2007 Saturn Sky, and ended production in 2009....

automobile platform

Automobile platform

An automobile platform is a shared set of common design, engineering, and production efforts, as well as major components over a number of outwardly distinct models and even types of automobiles, often from different, but related marques...

 shared with the Pontiac Solstice

Pontiac Solstice

The Pontiac Solstice is a small sports car from the Pontiac division of General Motors. Introduced at the 2004 North American International Auto Show, the Solstice roadster began production in Wilmington, Delaware, starting in mid-2005 for the 2006 model year. The exterior styling of the...

 and Opel GT

Opel GT

The Opel GT is a two-seat sports car first presented as a styling exercise in 1965 at the Paris and Frankfurt motor shows, and introduced as a production model late in 1968 by Opel, a German subsidiary of General Motors...

. The Sky concept was shown at the 2005 North American International Auto Show

North American International Auto Show

The North American International Auto Show is an annual auto show held in Detroit, Michigan at Cobo Center, usually in January. It is among the largest auto shows in North America.-History:...

, with the production version following at the 2006 show. It was built at GM's Wilmington, Delaware

Wilmington, Delaware

Wilmington is the largest city in the state of Delaware, United States, and is located at the confluence of the Christina River and Brandywine Creek, near where the Christina flows into the Delaware River. It is the county seat of New Castle County and one of the major cities in the Delaware Valley...

 plant, alongside the Solstice and the Opel GT. The Sky features 18 inch (457 mm) wheels and a 2.4 L

Litre

pic|200px|right|thumb|One litre is equivalent to this cubeEach side is 10 cm1 litre water = 1 kilogram water The litre is a metric system unit of volume equal to 1 cubic decimetre , to 1,000 cubic centimetres , and to 1/1,000 cubic metre...

 Ecotec LE5 straight-4

Straight-4

The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....

 engine that produces 177 hp, a new straight-4 2.0 L direct injected engine that makes 260 hp as well as a turbocharged (dealer upgrade kit) version that makes 290 hp.