When Auto Express first tested the Yaris D-4D diesel, we were staggered by its economy. Petrol variants are nearly as efficient, which helps explain your glowing praise for its running costs –– first is a great achievement. Almost as impressive is the reliability score of sixth place. Unfortunately, ropey ratings for performance, comfort, ride, handling and practicality have stopped the Yaris from climbing higher. Toyota’'s chunky new model should improve on these weaknesses next year.