THIS is the humble 30-year-old Ford Sierra that sold for over £100,000!

The saloon, a huge seller in the late 80s, was the family favourite of its time between Ford’s more famous Cortina and Mondeo models.

But this version was a little bit extra special selling for a whopping £115,000 thanks to low mileage and special kit.

The 1987 Sierra RS500 was expected to sell for £70,000 but a bidding frenzy saw the 30-year-old motor sell for way more.

The original owner paid just over £20,000 new and in the early 90s its value plummeted to around £10k.

The 153mph motor was considered a boy racer’s car with limited interested 20 years ago – but since then its stock has risen.

The Sierra – which has done just 11,000 miles – joined a host of other once mundane motors at auction at the Silverstone Classic Auction raking in huge profits.

Ford Sierra RS500

Ford Sierra RS500

The auction house sold a 1988 Peugeot 205 GTI hot hatch, with the desirable 1.9-litre engine, for £38,480.

Another bidder paid £72,000 for a 1991 Lotus Carlton, the controversial hot version of the Vauxhall family saloon which was deemed by many to be too fast when it originally went on sale.

And a 2010 Ford Focus RS500 sold for £54,000 – almost £20,000 more than it cost new just seven years ago.

The mint-condition hot hatch, capable of 160mph, has been driven just 125 miles.

Silverstone Auctions says sporty cars of the 1980s and 1990s are becoming increasingly sought after and are some of the fastest appreciating classics in the current market.

In total, collectors spent a whopping £5.5 million on cars over the three-day auction held at Silverstone.

Nick Whale, managing director of Silverstone Auctions, said: “It was an incredibly successful weekend, and we’re thrilled with the results.

“I’d like to thank our vendors and bidders for taking part in a fantastic sale, and I have to say our team did a fabulous job bringing such a quality selection of vehicles to auction on our biggest weekend of the year at the Silverstone Classic.”

I actually owned a Sierra in 1990 – I didn’t get over a £100k for it though. Damn!

Phil Lanning