When the Audi quattro first appeared in 1980 it caused a sensation, and it's probably responsible for more motor-noter purple prose than any other car before or since. Four-wheel-drive road cars were nothing new in 1980 - Spyker had been doing it during the vintage years and, of course, classic car enthusiasts could hardly forget Jensen's Interceptor FF. However, Audi - with its obsession for technical innovation - brought the formula into the modern age and, in doing so, revolutionised world rallying and took road-car handling and grip to new levels. With this new entry to Haynes' Great Cars series, Jeremy Walton updates the quattro book he originally wrote in the '80s. As with all the other entries in this series, this one if beautifully produced and presented but, although Walton has updated the details, this new entry is not as comprehensive as his earlier book.