Values for ex-fleet cars sold by Manheim reached their highest levels for at least 12 months in September.

They rose 2.2% (£159) compared to August.

According to Manheim’s monthly sales data, the value of de-fleeted cars was also up 5.4% (£387) year-on-year, helped by the average stock being five months younger than in 2014, and having an average of 3,088 fewer miles on the clock.

The average selling price of ex-fleet 4x4 vehicles was up 5.6% (£722) from August, and by 14.4% (£1,829) compared to September 2014.

The monthly rise was achieved despite the average 4x4 having 3,298 more miles on the clock. The average de-fleeted 4x4 sold by Manheim in September retained 48% of its original price – the highest residual value for any vehicle segment.

Younger stock boosted the values of large family, compact executive and executive cars at Manheim’s auctions in September, with the average stock in all three segments being two months younger than in August.

Average selling prices were up 6.5% (£401) for large family cars and 7.5% (£669) for compact executive cars.

In comparison to the same month in 2014, the top performers were MPVs – continuing the trend first identified by Manheim in July – with average selling prices up 31.2% (£1,846), much of which was likely due to being an average of 15 months younger and having an average of 22,462 fewer miles on the clock.

The value of superminis was up 27.2% (£1,211) compared to September last year, despite the volume being sold by Manheim increasing by 3% year-on-year.

Small hatchbacks and medium family cars made up a total of more than 50% of Manheim’s overall ex-fleet auction volumes.

Daren Wiseman, valuation services manager at Manheim, said: “The young, relatively low mileage and high quality ex-fleet stock in Manheim’s auctions ensured that September was a strong month in terms of average selling prices, which were at their highest levels for at least 12 months.

“The SMMT has announced the highest ever number of September new car registrations, so as the vehicles many of these are replacing are de-fleeted and make their way into our auction network, we may see a slowing of this growth in values as volumes increase in the coming weeks, as expected.

“While large family and compact executive models showed particular strength in September, we have also begun to see the increase in 4x4 values as we head towards the winter months, with dealers getting stock in early for buyers looking for vehicles that can tackle adverse road conditions.”