The Vauxhall Astra GTC was first unveiled at the Paris Motor Show last year, where Vauxhall admitted the three-door coupe-like design was aimed at replicating the more upmarket style often seen in more luxury cars.
With this in mind, the sportier Astra has been aimed squarely at the likes of the Vauxhall Scirocco and the Renault Megane Coupe.
Vauxhall says the new model will account for 20 per cent of UK Astra sales, highlighting its importance to the brand.
For the full production version, Vauxhall has stuck as closely to the concept as possible. In fact, the car shares no body panels with the Astra hatchback.
"We wanted the Astra GTC to be the ultimate expression of Vauxhall’s design language, and to embody our passion for the motor car," said Mark Adams, Vice President of Vauxhall/Opel design. "But we didn’t want emotion to get in the way of functionality: the Astra GTC still needed to be clever, affordable and practical."
Under the bonnet four engine choices include one diesel and three petrol options. The single 2.0-litre CDTi, 165PS diesel engine will be familiar with Insignia drivers because the engine is currently used in the saloon and estate line up.
The engine comes with some ‘green’ features such as Start/Stop, a diesel particulate filter and an efficient six-speed transmission.
Key figures for the diesel include a 0-62mph sprint time of under nine seconds and a top speed of 130mph, while delivering 57.9mpg and 129g/km of CO2 emissions.
Alternatively, the three petrol choices range from a 1.4-litre Turbo in 120 or 140Ps variations and a range-topping 1.6-litre Turbo developing 180PS.
Standard equipment across all engine and trim levels includes 18" alloy wheels, DAB stereo with USB connectivity. Extra gadgets such as an onboard computer, fog lamps and Bi-Xenon Advanced Forward Lighting are offered on higher specification levels.
The new Vauxhall Astra GTC starts from £18,495 and prices rise to £22,430 for range-topping models. The Astra GTC will go on sale in the UK towards the end of 2011.