The analysis found that for private cars, the difference between on-road and official  values rose from around 8% in 2001 to 31% in 2013, and 45% for company cars in 2013.
The analysis revealed that for private cars, the gap between on-road and official values increased from roughly 8% in 2001 to 31% in 2013, while for company cars, it reached 45% in 2013.