It goes without saying, buyers of expensive cars can usually afford to add as many optional extras as they want, but if you were wondering who are the biggest spenders, a new study from the UK has the answers – at least in what concerns British consumers.

According to an analysis from HPI Spec Check, a valuation service providing factory fitted options data, Porsche buyers are most likely to spend big money on optional extras. Buyers of the Cayenne luxury SUV spend on average almost £10,000 ($15,950) on factory fitted options. With that money, they could buy a Dacia Duster and still have some change left.

Next on the big spenders’ list are BMW X5 buyers, who add extras worth £8,000 ($12,780) on average. Third place goes to Mercedes SLK drivers, who spend £6,290 ($10,050) on optional extras. Owners of the Audi R8 and A8 complete the top 5, with £5,351 and £5,338, respectively.

Porsche is also on top when all models from a brand are taken into account, with an average of £7,394 spent on options for each car sold. BMW is second with £3,892, followed by Mercedes-Benz with £3,510. Mini (£2,974) and Audi (£2,370) are fourth and fifth, respectively.

But don’t think only luxury car buyers are tempted by the long lists of additional equipment. The Vauxhall Insignia has a reasonable average spend on extras of over £1,400, followed by the VW Golf with a little over £1,000. Data includes factory fitted options in the UK from the last six months and worth £75 million, across 19 manufacturers from Alfa Romeo to Volvo.

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