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 study found that the difference between on-road and official prices for private vehicles grew from about 8% in 2001 to 31% in 2013, while for company cars, this gap reached 45% in 2013.