The Vauxhall Astra VXR Exteme, which received its world debut at the Geneva motor show last week, has been shown in an official video from twin brand Opel.
Already confirmed as coming to the UK in low volumes from next year, the Astra VXR Exteme is the most powerful front-wheel drive car in Vauxhall's history.
The VXR Exteme develops "over 300bhp" from its 2.0-litre turbocharged direct-injection petrol engine. The powerplant, which also features variable cam phasing, drives through a six-speed manual transmission and a limited-slip differential.
By comparison, Standard VXRs produce 276bhp at 5300rpm and 295lb ft at 2400-4800rpm, allowing for 0-60mph in 5.9sec and a top speed of 155mph.
Vauxhall says the concept is 100kg lighter than the standard Astra VXR, in part thanks to the use of aluminium in place of steel, and the use of carbonfibre in the roof, bonnet, rear wing, diffuser, front spoiler, suspension cross-brace, rear wheelhouse vents and the wheels themselves.