In a battle between four-wheel-drive saloons, Tiff Needell from FifthGear gets to drive both the Audi S4 and the Vauxhall Insignia VXR around the track as he wants to see which of the two is faster.
The Audi S4 packs 328 BHP and is 150 Kg lighter than the Vauxhall Insignia VXR but it is also 5,000 GBP more expensive, and according so some, its design is not as exciting as the one on the Insignia.
When put to the test around the track the Vauhall Insignia VXR proves 2 seconds slower than the Audi S4, so it looks like each second gained in terms of performance by the Audi costs 2,500 GBP.       
Watch the video with the Audi S4 vs the Vauxhall Insignia VXR after the jump.

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Video: Audi S4 vs Vauxhall Insignia VXR

Source: FifthGear via YouTube