We’ve become familiar with modern cars failing to match their official combined consumption figures in normal driving, and while performance cars often get closer than many – they aren’t designed to be economical in a very specific set of conditions from the outset – the i30 N’s real-world fuel economy is still slightly disappointing for us.
Officially, it’ll do 34mpg on the WLTP cycle (around 5mpg shy of the old NEDC measurements), a figure matched by the Fastback N Performance. That's fairly close to reality, where you’ll be looking at mid-30s on a gentle motorway run and possibly just scratching the surface of 30mpg in everyday driving, with numbers plummeting the more performance you use.
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That, on its own, wouldn’t be such a problem – plenty of other cars in this class will do similar, albeit few are quite so thirsty – but the 50-litre tank can often seem a little on the small side for a car consuming at that rate. In theory around 300 miles should be possible, but a realistic fill-up interval of around 250 miles can wear a little thin on longer trips.
If you enjoy the performance then you may want to heed the cost of replacement tyres. The N’s 235/35 R19 Pirelli P-Zeros will set you back over £150 a corner fitted from online tyre supplier BlackCircles, but it is a wheel size ripe for experimenting with different tyre suppliers.
Still, Hyundai’s five-year, unlimited-mileage warranty should redress the balance somewhat when it comes to ownership, and aside from a few satnav stutters and a pessimistic tyre pressure sensor our Fast Fleet i30 N Performance proved trouble-free over seven months of use.