Used cars ranked: 10 biggest winners and losers

Despite the economic challenges being felt across the world, September 2025 was the second month in succession that used car values increased compared to a year ago.

This new information comes from Auto Trader, which analysed the prices of vehicles for sale across its various platforms, highlighting the second month of market growth in the used car sector.

We looked at Auto Trader’s data comparing year-on-year value for September 2025, then pulled out the 10 cars that made the biggest gains and losses:

10th. BMW M5

7.5 percent increase

We begin with the BMW M5. It saw a 7.5 percent increase in the typical asking price for the high-performance saloon (and now estate), compared to the previous year.

The average asking price for a BMW M5 advertised with Auto Trader now stands at £49,671. No doubt the launch of the latest plug-in hybrid M5 has helped stimulate demand in the marketplace.

9th. Renault Megane

7.6 percent increase

The Renault Megane boasts the lowest average value of all the cars in Auto Trader’s top 10. Sellers typically ask just £5,811 for the French hatchback.

Even still, this made for a 7.6 percent year-on-year increase, and a 3.8 percent jump compared to the month before.

8th. Jaguar F-Type

7.6 percent increase

Jaguar is not having the best of times, with no vehicles in production, and its Jaguar Land Rover parent company suffering the after-effects of a cyber attack.

There was better news for owners of the Jaguar F-Type sports car, though. Values demonstrated a 7.6 percent rise versus last year, taking the average asking price up to £38,389.

7th. Bentley Continental GT

9.3 percent increase

Premium brands accounted for many of the biggest winners during September 2025, with the Bentley Continental GT arguably the most upmarket of them all.

Buying a Continental GT now requires an average of £54,836. Prices for the luxury coupe have moved upwards by 9.3 percent in the last 12 months.

6th. Mercedes-Benz M-Class

9.8 percent increase

Auto Trader’s data specifically refers to the Mercedes-Benz M-Class, a name the German marque dropped for its luxury SUV a decade ago. Mercedes-Benz has used the GLE badge since 2015, meaning the older model is the one on the up.

The original Mercedes-Benz SUV reported a 9.8 increase in value year-on-year, pushing the average price up to £10,512 for the American-made 4×4.

5th. BMW M4

10.5 percent increase

September 2025 was seemingly a strong month for BMW M cars, with the M4 also posting a substantial price increase compared to 2024.

Owning a BMW M4, in either coupe or convertible form, now requires an average of £41,469, according to Auto Trader’s data. This made for a 10.5 percent jump in value for the high-performance machine.

4th. Volkswagen Beetle

10.9 percent increase

Auto Trader’s data does not distinguish which version of the Volkswagen Beetle demonstrated a substantial increase in value, but we assume it to be one of the later ‘reborn’ models.

Given the current enthusiasm for all things 1990s at present, the New Beetle could well be deserving of an increase in asking price. Although an average of £7,449 suggests the latest model (sold between 2011 and 2019) is the most likely beneficiary.

3rd. Range Rover

10.9 percent increase

The archetypal luxury SUV experienced a major increase in value over the past year, with the Range Rover up by 10.9 percent.

Demonstrating a rise of 4.0 percent in month-on-month prices, the Range Rover now commands an average of £47,381.

2nd. Mazda MX-5

12.3 percent increase

According to the internet, the Mazda MX-5 is the answer to almost any automotive question posed. It has also continued its reign as the world’s best-selling two-seat roadster for the 25th year in a row.

In comparison with 2024, average asking prices for the MX-5 have increased by a healthy 12.3 percent. You will require an average of £12,244 to own everyone’s favourite sports car.

1st. Audi RS6 Avant

14.9 percent increase

The biggest winner in September 2025, according to Auto Trader’s used car data, was the formidable Audi RS6 Avant. Although something of a niche proposition, it is heartening to know that enthusiasts still have plenty of love for the performance estate.

Average asking prices for the Quattro-enhanced wagon now stand at £65,043, suggesting the market is skewed in favour of the latest RS6 Avant models. This still represents a year-on-year increase of almost 15 percent, however.

The biggest losers of September 2025

Although Auto Trader reported an overall increase in average asking prices for September 2025, this stood at just 0.6 percent year-on-year.

Such a slight increase means that, naturally, there were losers in the used car marketplace. In particular, some electric vehicles suffered marked drops in value.

These were the 10 cars that witnessed the biggest contraction in value.

10th. Mercedes-Benz EQC

11.7 percent decrease

That the Mercedes-Benz EQC makes the bottom 10 is perhaps no surprise, given that the unloved model was discontinued in 2023. Being based on a combustion car platform was an obvious limitation for the EQC, which suffered from a limited range and modest performance.

Mercedes-Benz also announced a new electric GLC with EQ Technology at the 2025 Munich Motor Show, which may have compounded the 11.7 percent drop in EQC values.

This leaves average asking prices at £26,243 for the Mercedes electric SUV.

9th. Jaguar I-Pace

11.7 percent decrease

Ageing electric SUVs did not have a good time in September 2025, with the Jaguar I-Pace also dropping in value by 11.7 percent.

As one of the earliest electric SUVs to market, the I-Pace has become outclassed due to the speed of technological progress in this sector. Asking prices for the Jaguar EV are now typically just £20,710.

8th. Peugeot 5008

11.9 percent decrease

As noted, Auto Trader’s figures do not distinguish exactly which version of a particular model has seen the biggest drop in value. However, it is worth noting that a new Peugeot 5008 was launched last year, which may have impacted on prices for previous generations.

With an 11.9 percent decrease in value year-on-year, £17,932 is now the average asking price for a Peugeot 5008 SUV.

7th. Vauxhall Mokka X

12.6 percent decrease

Another model in the Stellantis family of brands experienced a substantial price drop during September 2025. The Vauxhall Mokka X fell by 12.6 percent.

Representing the facelifted version of the original Mokka compact crossover, asking prices are now typically just £8,272.

6th. BMW 2 Series Gran Tourer

14.7 percent decrease

There is a definite shortage of MPVs in the automotive marketplace, with the BMW 2 Series Gran Tourer one of the few remaining holdouts. However, the market was not kind to this BMW during September 2025.

A year-on-year decrease in values of almost 15 percent is substantial, with £10,936 now the typical asking price for the German marque’s MPV.

5th. Vauxhall Viva

15.9 percent decrease

A product from the final throes of Vauxhall being owned by General Motors, the Viva marked the return of a classic nameplate after almost four decades.

Deeply unremarkable when new, a 15.9 percent fall in prices is perhaps the biggest news for the Vauxhall Viva in years. Average asking prices on Auto Trader now stand at £5,151.

4th. MG4 EV

15.9 percent decrease

Although electric cars account for the entire bottom four of Auto Trader’s data, seeing the MG4 EV here is something of a surprise. The highly-rated MG collected a number of awards when launched, with keen prices aiding its appeal.

However, typical asking prices are now at £17,559 for the MG4 EV: a 15.9 percent year-on-year decrease. A new second-generation model went on sale in China during August 2025, so perhaps this explains this MG’s drop in value.

3rd. Volkswagen ID.4

14.9 percent decrease

Back in 2021, the Volkswagen ID.4 was named World Car of the Year. Now, it finds itself sinking in value by 14.9 percent for year-on-year value.

During its relatively brief lifespan, the ID.4 has struggled with reliability issues in various global markets. The typical UK asking price for the electric Volkswagen SUV now stands at £21,491.

2nd. Tesla Model Y

17.1 percent decrease

Tesla has endured a difficult time during 2025, affected by the politics of the marque’s association with CEO Elon Musk.

The company also announced a major update for the Model Y (codenamed Juniper) at the start of the year, which will likely have taken its toll on existing values.

Dropping by 17.1 percent leaves the average asking price for a Tesla Model Y at £27,322.

1st. MG5 EV

17.2 percent decrease

Beating the Tesla Model Y by 0.1 percent to the biggest value drop of September 2025, it’s the MG5 EV. One of the first electric MGs to hit the UK market, the MG5 EV was something of a rarity: a battery-powered compact estate.

Aging technology, and the sheer range of options in the modern electric car market, is likely to have contributed to a 17.2 percent loss in value year-on-year.

Just £11,831 is typically now all that is needed to own the electric MG5 EV estate.