Vauxhall reveals extreme Astra VXR The model, which features an integrated roll-cage, racing seats and six-pont harnesses, is derived from the Astra Cup race car that competed in last year's Nürburgring Endurance Championship. The Geneva show car will form the basis for a low-volume production model to mark 10 years of its VXR tuning division in the UK. While no acceleration figures have been announced, it is likely that the VXR's 2.0-litre turbocharged petrol engine will receive a hike in power from its standard 276bhp which, combined with a reduction in the car's weight, will improve performance on both road and track. The Vauxhall Astra VXR Extreme will make its debut at the Geneva motor show on March 4.