The Jaguar XK120 roadster, launched in 1949 and powered by the new twin overhead camshaft XK engine, set new standards for performance and style. A worldwide success, it was succeeded by the XK140 and XK150 models. This book looks at the qualities of these cars, with detailed analysis of their design and engineering aspects, a concise history of their production and development, and a review of their competition and record-breaking activities.