The Jaguar XKR-S and Aston Martin V8 Vantage. Two British bruisers. Both cost around £100k. Both have big V8s under the hood. But which is best? Steve Sutcliffe finds out. Read the full Jaguar XK review - http://www.autocar.co.uk/car-review/j... Read the full Aston Martin Vantage review - http://www.autocar.co.uk/car-review/a...